WASHINGTON — U.S. airstrikes targeted bases in Syria used by Iranian militant groups suspected of attacking American and allied forces in northern Iraq last week, the Pentagon announced late Thursday.
The strikes, the first authorized by President Joe Biden, hit multiple targets used by the militias the Pentagon blames for rocket attacks on a base in northern Iraq that killed a contractor and wounded U.S. and allied troops.
“The operation sends an unambiguous message: President Biden will act to protect American and Coalition personnel,” Pentagon spokesman John Kirby said in a statement. “At the same time, we have acted in a deliberate manner that aims to de-escalate the overall situation in both eastern Syria and Iraq.”
Biden’s decision to attack in Syria did not appear to signal an intention to widen U.S. military involvement in the region but rather to demonstrate a will to defend U.S. troops in Iraq.
“I’m confident in the target that we went after, we know what we hit,” Defense Secretary Lloyd Austin told reporters flying with him from California to Washington, according to the Associated Press.
Speaking shortly after the airstrikes, he added, “We’re confident that that target was being used by the same Shia militants that conducted the strikes,” referring to a Feb. 15 rocket attack in northern Iraq that killed one civilian contractor and wounded a U.S. service member and other coalition personnel.
Austin said he recommended the action to Biden.
“We said a number of times that we will respond on our timeline,” Austin said. “We wanted to be sure of the connectivity and we wanted to be sure that we had the right targets.”
Earlier, Kirby said the U.S. action was a “proportionate military response” taken together with diplomatic measures, including consultation with coalition partners.
Republican Sen. Marco Rubio also called the strikes “proportional and necessary.”
Biden administration officials condemned the Feb. 15 rocket attack near the city of Irbil in Iraq’s semi-autonomous Kurdish-run region, but as recently as this week officials indicated they had not determined for certain who carried it out. Officials have noted that in the past, Iranian-backed Shiite militia groups have been responsible for numerous rocket attacks that targeted U.S. personnel or facilities in Iraq.
Kirby had said Tuesday that Iraq is in charge of investigating the Feb. 15 attack.
“Right now, we’re not able to give you a certain attribution as to who was behind these attacks, what groups, and I’m not going to get into the tactical details of every bit of weaponry used here,” Kirby said. “Let’s let the investigations complete and conclude, and then when we have more to say, we will.”
A little-known Shiite militant group calling itself Saraya Awliya al-Dam, Arabic for Guardians of Blood Brigade, claimed responsibility for the Feb. 15 attack. A week later, a rocket attack in Baghdad’s Green Zone appeared to target the U.S. Embassy compound, but no one was hurt.
Iran this week said it has no links to the Guardians of Blood Brigade.
The frequency of attacks by Shiite militia groups against U.S. targets in Iraq diminished late last year ahead of Biden’s inauguration, though now Iran is pressing America to return to Tehran’s 2015 nuclear deal. The U.S. under the Trump administration blamed Iran-backed groups for carrying out the attacks. Tensions soared after a Washington-directed drone strike that killed top Iranian Gen. Qassem Soleimani and powerful Iraqi militia leader Abu Mahdi al-Muhandis last year.
Trump had said the death of a U.S. contractor would be a red line and provoke U.S. escalation in Iraq. The December 2019 killing of a U.S. civilian contractor in a rocket attack in Kirkuk sparked a tit-for-tat fight on Iraqi soil that brought the country to the brink of a proxy war.
U.S. forces have been significantly reduced in Iraq to 2,500 personnel and no longer partake in combat missions with Iraqi forces in ongoing operations against the Islamic State group.
Contributing: Associated Press