The U.S. carried out airstrikes in Iraq and Syria.

Politics|The U.S. carried retired airstrikes successful Iraq and Syria.

The United States carried retired airstrikes aboriginal Monday greeting successful Iraq and Syria against 2 Iranian-backed militias that the Pentagon said had conducted drone strikes against American unit successful Iraq successful caller weeks, the Defense Department said.

“At President Biden’s direction, U.S. subject forces earlier this evening conducted antiaircraft precision airstrikes against facilities utilized by Iran-backed militia groups successful the Iraq-Syria borderline region,” the Pentagon spokesman, John F. Kirby, said successful a statement.

Mr. Kirby said the facilities were utilized by Iranian-backed militias, including Kata’ib Hezbollah and Kata’ib Sayyid al-Shuhada, to store arms and ammunition for carrying retired attacks against places wherever Americans were located successful Iraq. There were nary contiguous reports of casualties but a subject after-action reappraisal is ongoing, Pentagon officials said.

The strikes were the 2nd clip that Mr. Biden has ordered the usage of unit successful the region. The United States carried retired airstrikes successful eastbound Syria successful precocious February against buildings belonging to what the Pentagon said were Iran-backed militias liable for attacks against American and allied unit successful Iraq.

Pressure has been gathering for weeks from Democrats and Republican successful Congress, and from immoderate of Mr. Biden’s apical advisers and commanders, to retaliate against the menace posed by the drones to American diplomats and the 2,500 U.S. troops successful Iraq who are grooming and advising Iraqi forces.

At slightest 5 times since April, the Iranian-backed militias person utilized small, explosive-laden drones that divebomb and clang into their targets successful late-night attacks connected Iraqi bases — including those utilized by the C.I.A. and U.S. Special Operations units, according to American officials. So far, nary Americans person been wounded successful the attacks, but officials interest astir the precision of the drones, besides called unmanned aerial vehicles, oregon U.A.V.’s.

Iran — weakened by years of harsh economical sanctions — is utilizing its proxy militias successful Iraq to measurement up unit connected the United States and different satellite powers to negociate an easing of those sanctions arsenic portion of a imaginable revival of the 2015 atomic deal.