The governor of Iraq's southern Thi Qar province says militants have attacked a checkpoint and two nearby restaurants, killing at least 60 people and wounding 83.
Daesh or ISIS claimed responsibility for twin attacks.
Al-Nassiri also said the majority of the dead are expected to be Iranian pilgrims who were inside the restaurant.
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Shortly afterward, two suicide bombers, including one driving a vehicle rigged with explosives, blew themselves, Iraqi officials said. In a statement released by its propaganda arm Amaq, IS said several suicide bombers had staged the assault on a restaurant and a security checkpoint.
IS-backed attacks in southern Iraq, where the bulk of the country's oil is produced, are relatively rare thanks to a tighter grip maintained by the Iraqi security forces.
"An assailant activated his belt of explosives inside restaurant, crowded, and a group of or men opened fire and threw grenades on guests", said Ali Abdul Hussain, colonel of police, Reuters news agency. It occurs in aftermath of a visit of iraqi prime minister, Haider Al-Abadi, in province of Dhi Qar, in particular, to Nasiriyya.
Both attacks happened on September 14 near the city of Nasiriyah in southern Iraq's Dhi Qar province. Thi Qar is about 320 km from Baghdad.