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.
Chipotle plans first price increase in 3 years
Justin Bieber crashes Drake Bell's album release party