People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

A woman is escorted away from the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

A woman and a girl are escorted away from the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People extinguish a fire at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

A woman is escorted away from the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

A woman and a girl are escorted away from the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)

People gather at the scene of a car bomb explosion outside a church in the Kurdish-majority city of Qamishli in northeast Syria on July 11, 2019. - There was no immediate claim for the attack, which Syrian state television said left several people wounded and cars damaged. Syria's Kurds have led the US-backed fight in the war-torn country against the Islamic State group, which continues to claim deadly attacks despite its territorial defeat in March. (Photo by Gihad Darwish / AFP)