Several blasts hit a US-led coalition military base in Baghdad early on Sunday from an apparent rocket attack, a US military official said.

The official did not immediately say if the attack caused any casualties or significant damage.

Rocket attacks that Washington blames on Iran-backed militias have regularly hit near and occasionally on the US embassy which is next to the base.

On February 13, Iran had warned the US that it will strike US and Israel if they make the 'slightest error'.

"If you make the slightest error, we will hit both of you," Major General Hossein Salami said at a ceremony marking the 40th day since the death of Iranian General Qassem Soleimani.

Soleimani, who was head of the Quds Force, a branch of the Guards responsible for operations outside Iran, was killed by a US drone in Baghdad on January 3 along with Iraqi militia commander Abu Mahdi al-Muhandis.