There are reports that two rockets landed near the US embassy in Baghdad on Monday.
The extent of damage is not clear yet. Also not clear was where the rockets came from.
A BBC reporter Nafiseh Kohnavard near the scene confirmed the rockets in a tweet and said alarms were sounded warning people to take cover.
In recent times, rockets had targeted some military bases used by the US soldiers, after Iranian missile attacks on 8 January on Al Asad and Erbil air bases.
Although the US initially claimed no person was injured or killed, a dew days ago, the Pentagon admitted some injuries to 11 US soldiers.
The US has blamed recent rocket attacks on the Green Zone on Iran-backed paramilitary groups. There has never been a claim of responsibility.