The official said the attacker set off an explosive vest among a gathering of Sahwa members who were receiving their paychecks in the al-Taji district in northern Baghdad, IraqiNews.com reported.
The inured included seven Iraqi soldiers, an official said.
Sahwa is another name for Awakening groups founded to counter the influence of al-Qaida in Iraq.
2014: The Year in Fashion [PHOTOS]
Syrian Al Qaida group executes Lebanese soldier