The Mujahedin-e Khalq Organization (MKO) Iranian exile group sheltering in Iraq says at least one person has been killed after its camp outside Baghdad came under mortar fire.
MKO camp spokesman Shahriar Kia said a number of camp residents were wounded in the attack.
It was unclear who fired the mortars.
The Iraqi government wants the MKO out of the country and the UN has been working to find another location for the group to live.
The MKO is the militant wing of a Paris-based Iranian opposition group that opposes Iran's current government and fought alongside Saddam Hussein's forces in the Iran-Iraq War in the 1980s.
Based on reporting by AP and Reuters