Washington: Five Katyusha rockets were fired at the fortified Green Zone in Baghdad Sunday night, local time, one directly hitting the US Embassy building, Iraq's security forces reported.

US helicopters were seen evacuating injured people, al-Sumaria News reported, citing an anonymous security official.

Protesters set fire to close a street during clashes between security forces and anti-government protesters near Baghdad's Khilani square, Iraq, on Sunday. Credit:AP

The US State Department released a statement that did not comment on any injuries or deaths. But it noted there have been 14 attacks on US personnel in Iraq since September. It also called on Iraq to "fulfil its obligations to protect our diplomatic facilities."

"The security situation remains tense and Iranian-backed armed groups remain a threat," the statement read. "So we remain vigilant."