At least 12 people were killed and 32 wounded when a suicide bomber wearing a vest packed with explosives attacked a mosque west of the capital Baghdad, officials have said.
The blast struck a Sunni mosque in Abu Ghraib, roughly halfway between Baghdad and the city of Fallujah, as worshipers gathered after midnight to pray, police and medics told Reuters early on Tuesday, Al-Jazeera reported.
A separate report by AP said the death toll was 14, citing police and hospital officials who spoke on condition of anonymity as they were not allowed to release information.
No group has yet claimed the attack, which took place during the Muslim holy month of Ramadan.
The attack was the first in or around Baghdad since the Iraqi government declared victory on Sunday over the self-styled Islamic State terrorist group in the city of Fallujah, further west. Fallujah, in Anbar province, had been under the control of IS since January 2014.
The city, the first to fall to the armed group, was seen as a launching pad for recent IS bombings in and around the capital.
Its recapture by the government was part of a broader anti-IS offensive, which saw tens of thousands of civilians risk death to flee their homes, leaving Iraq to grapple with a humanitarian crisis as its forces prepare to launch an attack in Mosul, the last remaining major hub of IS in the country.
