A rocket fell on Thursday night in the Fadhlan area of the Dujail district in Iraq's northern Salahuddin province, police sources said. The area is close to the Balad air base which houses U.S. troops.
The source of the rocket is unknown, the sources said. It caused no casualties. Dujail is 50 km (30 miles) north of Baghdad. Balad base is about 80 kilometres (50 miles) north of Baghdad.
On Wednesday, police soruces said Katyusha rockets fell inside Baghdad's Green Zone.
Initially, police sources said that three rockets fell within the zone, which houses government buildings and foreign missions. An Iraqi military statement said that "Two Katyusha rockets fall inside the Green Zone without causing casualties." It said that more details are to come.
The Green Zone was also targeted by rockets on Sunday. Three Katyusha rockets fell within the area, wounding six people. Another two fell within the nearby Jadriya area, the Iraqi military said.