Five Katyusha rockets landed Monday near the sites of a U.S. oil company in Iraqi southern province of Basra without causing casualties, Xinhua reported citing a local security source.

The attack took place in the early morning when the rockets landed near the U.S. Halliburton oil firm in the al-Zubair area in western part of Basra province, the source told Xinhua on condition of anonymity.

The attack caused no human casualty except for slight damages, the source said, while the Iraqi security force conducted a search campaign in nearby areas and found the rocket launcher, the source said. 

No group has so far claimed responsibility for the attack, as the military bases housing U.S. troops and other U.S. interests across Iraq have been frequently targeted by insurgent mortar and rocket attacks.