Multiple rockets were launched at Iraq's Ain al-Asad airbase housing US-led forces late on Thursday, US and Iraqi sources said, with no damage or casualties reported.
Two US officials said the base itself had not been struck in the attack.
The attack came two days after a military summit in Washington where Iraqi and US officials discussed winding down the coalition's work a decade after it was formed to fight ISIS as it stormed across Iraq and Syria.
No major announcement was made at the end of the talks, though US and Iraqi sources say an announcement that it will begin to gradually wind down is likely in the coming weeks.
Iran-aligned Iraqi political and military factions have pressured the country's government to quickly draw down the coalition's work and say they want all 2,500 troops deployed by the country's one-time occupier to leave.
Washington and the Iraqi government say they want to transition to a bilateral security relationship that would likely see some troops remain in an advisory role.
US-led forces invaded Iraq in 2003, toppled former leader Saddam Hussein and then withdrew in 2011, only to return in 2014 to fight ISIS at the head of the coalition.
Iran-backed Iraqi armed factions have targeted bases housing US troops in Iraq and Syria dozens of times since the Israel-Hamas war began on Oct. 7, though there have only been a handful of attacks since February, when a truce took hold.
