It stated that Iran had fired more than a dozen missiles at two military bases.
"It is clear that these missiles were launched from Iran and targeted at least two Iraqi military bases hosting U.S. military and coalition personnel at Al-Assad and Irbil," Jonathan Hoffman, assistant to the Secretary of Defense for Public Affairs, said in a statement.
He also stated that they were working on initial battle damage assessments.
"As we evaluate the situation and our response, we will take all necessary measures to protect and defend U.S. personnel, partners, and allies in the region," the Pentagon said.
As we reported earlier, Iran has fired more than a dozen rockets at two Iraqi military bases hosting US troops early on January 8, 2020.
Iran has threatened to strike Dubai and Haifa in Israel if the US responds to its ballistic missiles attack.