At least 33 people, including a local army chief, have died and 46 have been injured in a suicide attack on the western edge of Baghdad, officials say.
The attack took place in the Abu Ghraib municipality, and appeared to target a group of dignitaries as they left a national reconciliation conference, BBC reported.
Violence levels have declined in Iraq recently, but this is the third major attack in the last few days.
More than 30 died in an attack on a police recruitment centre on Sunday.
On Thursday, a car bomb exploded at a cattle market in Babel province killing 10.
The BBC's Mike Sergeant in Baghdad says it is too soon to say whether the attacks constitute a pattern but they show that life in Iraq is still dangerous.
But he says that if the violence of recent days continues, a timetable announced by US President Barack Obama to withdraw most combat troops by mid-2010 could be increasingly hard to maintain.