A suicide bomber has attacked members of an Iraqi government-backed Sunni militia group north of Baghdad.
Police and hospital officials said at least 18 people were killed and more than 40 were wounded.
Initial reports had said only four people were killed in the February 4 attack in the town of Taji, 20 kilometers north of the capital.
The suicide bomber detonated his explosives as the men gathered outside a police station to collect their salaries.
It came a day after suicide attackers and gunmen hit a provincial police headquarters in Kirkuk, also north of Baghdad, killing at least 15 people and wounding dozens.
There has been an increase in violence in recent weeks in Iraq amid tensions between Iraq's minority Sunni Muslims and the Shi'ite-led government.
Thousands of Sunni protesters have been rallying for weeks against Shi'ite Prime Minister Nuri al-Maliki, accusing him of persecuting Sunnis.
Based on reporting by Reuters and AP