This frame taken from video shows a scene of an explosion in Kenya's capital, Nairobi, Tuesday Jan. 15, 2019. Gunfire and explosions were reported near an upscale hotel complex. (AP Photo/Josphat Kasire)

Undercover police are seen at the scene of a blast in Nairobi, Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. Witnesses and police at the scene called it a terror attack. (AP Photo/Ben Curtis)

Security forces are seen at the scene of a blast in Nairobi, Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. Witnesses and police at the scene called it a terror attack. (AP Photo/Ben Curtis), APTOPIX

Security forces are seen at the scene of a blast in Nairobi, Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. Witnesses and police at the scene called it a terror attack. (AP Photo/Ben Curtis)

Security forces are seen at the scene of a blast in Nairobi, Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. Witnesses and police at the scene called it a terror attack. (AP Photo/Ben Curtis)

Security forces are seen at the scene of a blast in Nairobi, Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. Witnesses and police at the scene called it a terror attack. (AP Photo/Ben Curtis)

Bodies are seen at the site of a blast, in an upscale hotel complex in Kenya's capital in Nairobi, Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. The al-Shabab extremist group based in neighboring Somalia claimed responsibility and said its members were still fighting inside. (AP Photo/Khalil Senosi)

Security forces helps a woman at the scene of a blast in Nairobi, Kenya Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. The al-Shabab extremist group based in neighboring Somalia claimed responsibility and said its members were still fighting inside. (AP Photo/Khalil Senosi)

Fire and smoke rise from the scene of an explosion in Nairobi, Kenya Tuesday, Jan. 15, 2019.An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. The al-Shabab extremist group based in neighboring Somalia claimed responsibility and said its members were still fighting inside. (AP Photo/Khalil Senosi)

Fire and smoke rises from an explosion in Nairobi, Kenya Tuesday, Jan. 15, 2019. An upscale hotel complex in Kenya's capital came under attack on Tuesday, with a blast and heavy gunfire. The al-Shabab extremist group based in neighboring Somalia claimed responsibility and said its members were still fighting inside. (AP Photo/Khalil Senosi)

Security forces help civilians flee the scene as cars burn behind, at a hotel complex in Nairobi, Kenya Tuesday, Jan. 15, 2019. Terrorists attacked an upscale hotel complex in Kenya's capital Tuesday, sending people fleeing in panic as explosions and heavy gunfire reverberated through the neighborhood. (AP Photo/Ben Curtis), APTOPIX

Civilians flee the scene at a hotel complex in Nairobi, Kenya Tuesday, Jan. 15, 2019. Terrorists attacked an upscale hotel complex in Kenya's capital Tuesday, sending people fleeing in panic as explosions and heavy gunfire reverberated through the neighborhood. (AP Photo/Ben Curtis)

Security forces help a man at the scene of a blast in Nairobi, Kenya Tuesday, Jan. 15, 2019. Terrorists attacked an upscale hotel complex in Kenya's capital Tuesday, sending people fleeing in panic as explosions and heavy gunfire reverberated through the neighborhood. (AP Photo/Khalil Senosi)

Security forces help a man at the scene of a blast in Nairobi, Kenya Tuesday, Jan. 15, 2019. Terrorists attacked an upscale hotel complex in Kenya's capital Tuesday, sending people fleeing in panic as explosions and heavy gunfire reverberated through the neighborhood. (AP Photo/Khalil Senosi)

This image taken from an AFP TV footage shows people running in a street in Nairobi as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

This image taken from an AFP TV footage shows people running in a street as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

This image taken from an AFP TV footage shows people in a street as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

This image taken from an AFP TV footage shows people standing next to a wall as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

This image taken from an AFP TV footage shows a woman escorted by an official as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

Members of the security forces arrive at the site of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by - / AFP)

Students leave their campus following an explosion at a nearby hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by - / AFP)

An injured man is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by SIMON MAINA / AFP)

EDITORS NOTE: Graphic content / An injured man is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by SIMON MAINA / AFP)

An injured man is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by SIMON MAINA / AFP)

An injured man is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by SIMON MAINA / AFP)

EDITORS NOTE: Graphic content / Journalists carry a victim at the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - A gunfight was underway following the blast in the leafy Nairobi neighbourhood, an AFP reporter and a witness said. It was not immediately clear whether the incident was a robbery or an attack. (Photo by SIMON MAINA / AFP)

This image taken from an AFP TV footage shows police and militariesas a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

This image taken from an AFP TV footage shows police and militaries standing next to a vehicle as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

This image taken from an AFP TV footage shows people escorted by police in a street as a gunfight was underway following a blast at a hotel and office complex in a leafy Nairobi neighbourhood on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. (Photo by Raphael AMBASU / AFP)

People leave a hotel at the scene of an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

Kenyan security forces take position following an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

People leave a hotel at the scene of an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

Kenyan special forces take position outside a hotel complex following an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

Kenyan special forces take position outside a hotel complex following an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

People leave a hotel complex following an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

A woman collapsed after leaving a hotel following an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

People leave a hotel complex following an explosion in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

People are evacuated as a gunfight was underway following a blast at a hotel and office complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

People are evacuated as a gunfight was underway following a blast at a hotel and office complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

A woman collapses as she is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

A woman is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

A woman is evacuated from the scene of an explosion at a hotel complex in Nairobi's Westlands suburb on January 15, 2019, in Kenya. - The Al-Shabaab Islamist group in Somalia claimed responsibility for an ongoing attack in the Kenyan capital, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by Luis TATO / AFP)

People are evacuated as a gunfight was underway following a blast at a hotel and office complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

People are evacuated as a gunfight was underway following a blast at a hotel and office complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

A Kenyan security officers rescue a survivor as a gunfight was underway following a blast at a hotel and office complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

Kenyan security forces arrive at the scene of an explosion at a hotel complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

This picture taken on January 15, 2019 shows a hotel complex where an explosion was heard in Nairobi. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

Kenyan security forces arrive at the scene of an explosion at a hotel complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

Kenyan security forces arrive at the scene of an explosion at a hotel complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

A security man runs into safety in the scene of an explosion at a hotel complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

Two men stand next to burning cars at the scene of an explosion at a hotel complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)

People are evacuated as a gunfight was underway following a blast at a hotel and office complex in Nairobi on January 15, 2019. - A blast at the DusitD2 compound, which includes a hotel and several office buildings housing international companies, was heard from AFP's offices some five kilometres (three miles) away. The Al-Shabaab Islamist group in Somalia claimed responsibility for the attack, according to the SITE Intelligence Group which monitors jihadist activities. (Photo by SIMON MAINA / AFP)