There were no injuries and the damage is being assessed. “We will provide updates when we have more information,” Operation Inherent Resolve spokesperson Col. Wayne Marotto tweeted Monday afternoon.
US forces used artillery to retaliate at positions from which rockets were launched.
The precise source of the attacks on US forces in Syria was not immediately clear.
The rocket attack comes after US airstrikes against facilities used by Iran-backed militias.
The US “defensive precision airstrikes” have targeted facilities used by militias such as Kata’ib Hezbollah (KH) and Kata’ib Sayyid al-Shuhada (KSS), according to the Department of Defense.
Facilities targeted by the United States are engaged in unmanned aerial vehicle or drone attacks on U.S. personnel and facilities in Iraq, the Defense Department said in a statement.
A US official said the affected locations included the site from which the drones took off, recovered and checked.
The official also said there had been “at least five” drone attacks by Iranian-backed militias against bases in Iraq where US troops, contractors or other personnel are located.
President Biden and members of his cabinet on Monday cited Article II of the constitution which allows the president to take action to defend U.S. personnel as the authority responsible for carrying out the strikes.
“And I directed last night’s airstrikes against sites used by the Iranian-backed militias responsible for the recent attacks on US personnel in Iraq, and I had that authority under Article 2″ Mr. Biden told reporters. “And even those on the Hill who are reluctant to acknowledge it have recognized that it was. ”
The decision to strike comes as Congress debates whether to reign over presidential war power and repeal 1991 and 2002 authorizations for the use of military force in Iraq.
The House voted to repeal the 2002 AUMF in Iraq, and the Senate Foreign Relations Committee is expected to debate the repeal of the two authorizations.
Democratic Senator Tim Kaine of Virginia – who led efforts to repeal AUMF – told reporters earlier this month that although the House bill does not include the 1991 authorization, the House and the Senate could meet in conference to develop acceptable legislation.