A security official says militants have fired a Katyusha rocket at a camp housing several thousand Iranian exiles in northeastern Iraq. The Diyala province official says the attack on Camp Ashraf took place late Tuesday. It was the second rocket attack on the camp this week. The official spoke on condition of anonymity because he was not authorized to talk to the media.

The Iranian group — known as the People's Mujahedeen Organization of Iran — was a one-time ally of Saddam Hussein in a common fight against Iran. The group said Wednesday the rocket fell near housing units inside the camp but that there were no casualties.

Under an agreement with the United Nations and the Iraqi government, the residents are to move to a new location in Baghdad in the coming days.