The rockets were fired from an area in southern Baghdad where Iraqi paramilitary forces close to Iran hold sway.
A foreign security source inside the Green Zone said that two 100mm rockets hit close to the US embassy and a third fell into the Tigris River, which the embassy overlooks.
“One hit about three meters (10 feet) inside a gate on the embassy compound,” the source told AFP.
An Iraqi security source confirmed to AFP that two Katyusha rockets landed near the embassy shortly before midnight.
None of the sources mentioned any casualties and no group claimed responsibility for the attacks.