The Iraqi army did not immediately claim responsibility for the attack, but no casualties were reported.
Two rockets hit a base at Baghdad airport in Iraq, the second such attack in 10 days by US-led coalition forces.
A security source told the AFP news agency that a projectile was intercepted by C-RAM counter-rockets, artillery and mortar systems deployed to defend American forces in Iraq. There was no immediate claim to responsibility for the attack.
The rockets were fired from the vicinity of the airport, security officials said.
Washington regularly accuses Iran-affiliated Iraqi groups of carrying out such attacks on its troops and diplomats.
Both Tehran and Washington have had a presence in Iraq since 2003, with 2,500 US troops still stationed there.
One Iraqi soldier was wounded when three rockets landed in the base area of Baghdad airport last week.
Since US President Joe Biden took office in January, about 30 rocket or bomb attacks have targeted US interests in Iraq – including the military, the embassy or the Iraqi embassy, supplying foreign forces.
Two foreign contractors, one Iraqi contractor and eight Iraqi nationals were killed in the operation.
Operations are sometimes claimed by vague groups Experts say Iraqis have long been smokers for Iraq-backed organizations.
Is ‘occupying’ US forces
The sensitivities come at a sensitive time as Iran seeks to bring the United States back into the 2015 nuclear deal as it engages in talks with world powers.
Baghdad reportedly held a secret meeting with senior officials from Tehran and US ally Saudi Arabia last month.
Iraq has been working to mediate between its former neighbors Iran and Saudi Arabia in the south.