The sound of several explosions was heard and sirens sounded at the US embassy, according to the reports.
No groups or individuals have claimed responsibility for the attack so far.
In reaction to US support for the Israeli regime in the Gaza war, the Iraqi Resistance groups have repeatedly targeted the positions of American forces in recent weeks.
After the martyrdom of Resistance commanders who led the anti-terrorism fight in Iraq and Syria, the Iraqi parliament approved a piece of legislation to call for the withdrawal of American troops from the country, a demand that the US troops have yet to meet.
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