Baghdad municipality workers clean the scene of a double suicide bombing in Baghdad, Iraq, Monday, Jan. 15, 2018. Interior Ministry spokesman said a double suicide bombing in central Baghdad has killed and wounded civilians. (AP Photo/Ali Abdul Hassan)

Iraqi security forces gather at the scene of a double suicide bombing in Baghdad, Iraq, Monday, Jan. 15, 2018. Interior Ministry spokesman said a double suicide bombing in central Baghdad has killed and wounded civilians. (AP Photo/Ali Abdul Hassan)

Iraqi security forces gather at the scene of a double suicide bombing in Baghdad, Iraq, Monday, Jan. 15, 2018. Interior Ministry spokesman said a double suicide bombing in central Baghdad has killed and wounded civilians. (AP Photo/Ali Abdul Hassan)

Iraqi security forces gather near blood stains at the scene of a double suicide bombing in central Baghdad, Iraq, Monday, Jan. 15, 2018. Interior Ministry spokesman says a double suicide bombing in central Baghdad has killed and wounded civilians. (AP Photo/Ali Abdul Hassan)

Iraqi security forces cordon off the area where a double suicide bombing killed more than 20 people in central Baghdad on January 15, 2018, the second such attack in the Iraqi capital in three days. / AFP PHOTO / SABAH ARAR

Iraqi security forces cordon off the area where a double suicide bombing killed more than 20 people in central Baghdad on January 15, 2018, the second such attack in the Iraqi capital in three days. There was no immediate claim of responsibility, but most such attacks in Iraq are the work of the Islamic State jihadist group. / AFP PHOTO / SABAH ARAR

Iraqi security forces cordon off the area where a double suicide bombing killed more than 20 people in central Baghdad on January 15, 2018, the second such attack in the Iraqi capital in three days. There was no immediate claim of responsibility, but most such attacks in Iraq are the work of the Islamic State jihadist group. / AFP PHOTO / SABAH ARAR

Iraqis walk past the area where a double suicide bombing killed more than 20 people in central Baghdad on January 15, 2018, the second such attack in the Iraqi capital in three days. There was no immediate claim of responsibility, but most such attacks in Iraq are the work of the Islamic State jihadist group. / AFP PHOTO / SABAH ARAR

An Iraqi security member stands guard in the area where a double suicide bombing killed more than 20 people in central Baghdad on January 15, 2018, the second such attack in the Iraqi capital in three days. There was no immediate claim of responsibility, but most such attacks in Iraq are the work of the Islamic State jihadist group. / AFP PHOTO / SABAH ARAR

BAGHDAD, IRAQ - JANUARY 15 : Iraqi security forces stand guard at the bombing scene in Tayaran Square, Baghdad, Iraq on January 15, 2018. At least 25 people were killed and 90 people were injured in a double suicide bombing in the Iraqi capital Baghdad on Monday, according to a local security official. Haydar Hadi / Anadolu Agency

BAGHDAD, IRAQ - JANUARY 15 : People gather at the bombing scene in Tayaran Square, Baghdad, Iraq on January 15, 2018. At least 25 people were killed and 90 people were injured in a double suicide bombing in the Iraqi capital Baghdad on Monday, according to a local security official. Haydar Hadi / Anadolu Agency

BAGHDAD, IRAQ - JANUARY 15 : People gather at the bombing scene in Tayaran Square, Baghdad, Iraq on January 15, 2018. At least 25 people were killed and 90 people were injured in a double suicide bombing in the Iraqi capital Baghdad on Monday, according to a local security official. Haydar Hadi / Anadolu Agency

BAGHDAD, IRAQ - JANUARY 15 : People gather at the bombing scene in Tayaran Square, Baghdad, Iraq on January 15, 2018. At least 25 people were killed and 90 people were injured in a double suicide bombing in the Iraqi capital Baghdad on Monday, according to a local security official. Haydar Hadi / Anadolu Agency

BAGHDAD, IRAQ - JANUARY 15 : People gather at the bombing scene in Tayaran Square, Baghdad, Iraq on January 15, 2018. At least 25 people were killed and 90 people were injured in a double suicide bombing in the Iraqi capital Baghdad on Monday, according to a local security official. Haydar Hadi / Anadolu Agency

BAGHDAD, IRAQ - JANUARY 15 : People gather at the bombing scene in Tayaran Square, Baghdad, Iraq on January 15, 2018. At least 25 people were killed and 90 people were injured in a double suicide bombing in the Iraqi capital Baghdad on Monday, according to a local security official. Haydar Hadi / Anadolu Agency