President Donald Trump gave Iraq's new prime minister an effusive welcome at the White House on Tuesday.
A "post-attack damage assessment" was being conducted, a spokesperson said.
A coalition of countries led by the U.S. and U.K. on Saturday carried out a new round of strikes on the Houthis in Yemen "in response to the Houthis' continued attacks against commercial and naval vessels" in and around the Red Sea, officials said.
The U.S. carried out an airstrike in Baghdad on Wednesday targeting a senior leader of an Iranian-backed militia in Iraq that was blamed for attacks on U.S. forces in the Middle East, according to U.S. Central Command.
There have been more than 150 rocket and drone attacks on U.S. bases in Iraq and Syria since mid-October carried out by Iranian-backed militias claiming they are in support of Palestinians in the Israeli-Hamas war in Gaza.
The attack was one of the largest-scale ballistic missile attacks to date that the US has seen carried out by Iran-backed militias in Iraq