The attack took place in the evening when two rockets were fired from Radhwaniyah area southwest of the capital, the media office of the Iraqi Joint Operations Command said in a statement.

No group has so far claimed responsibility for the rocket attack, but Baghdad airport and the Iraqi military bases housing US troops across Iraq, as well as the US embassy in the Green Zone, have been frequently targeted by mortar and rocket attacks.

The Iraqi-U.S. relations have witnessed a tension since Jan. 3 when a US drone struck a convoy at Baghdad airport, which killed Qassem Soleimani, former commander of the Quds Force of Iran's Islamic Revolution Guards Corps, and Abu Mahdi al-Muhandis, deputy chief of Iraq's paramilitary Hashd Shaabi forces.

The U.S. airstrike prompted the Iraqi parliament on Jan. 5 to pass a resolution requiring the government to end the presence of foreign forces in the country.

More than 5,000 U.S. troops have been deployed in Iraq to support the Iraqi forces in the battles against the Islamic State militants, mainly for training and advisory purposes.