Sixteen army recruits were killed and 21 wounded on Saturday when a suicide bomber detonated his explosive vest at their recruitment centre west of Baghdad.
The recruits were from the largely rural tribal area close to Abu Ghraib, and part of an effort to get Sunni tribesmen into the security forces to combat Iraq's insurgency.
Insurgents frequently target recruiting centres for Iraq's fledgling police and army.
Elsewhere, a mortar round killed a woman and wounded two men in the largely Shiite southwestern neighbourhood of Bayaa, one of the faultlines of the sectarian fighting in Baghdad.
