Rockets have hit a camp housing members of anti-Iran terrorist Mujahedin-e Khalq Organization (MKO) near the Iraqi capital, Baghdad.
At least 20 rockets landed at the camp, known as Camp Liberty, reports say, adding some of the rockets hit water canals.
There were no reports of casualties and no one has yet claimed the responsibility for the incident.
On February 9, seven MKO members were killed and 50 others injured in a mortar attack on Camp Liberty. A number of Iraqi policemen were also injured in the attack.
The MKO has carried out numerous acts of violence against Iranian civilians and government officials.
The US-backed group fled to Iraq in 1986, where it received the support of executed Iraqi dictator Saddam Hussein, and set up its camp near the Iranian border.
Members of the MKO were transferred from Camp New Iraq, formerly known as Camp Ashraf, which is situated about 120 kilometers (74 miles) west of the border with Iran, to Camp Liberty near Baghdad Airport last year.