The U.S. launched airstrikes Thursday against an Iran-backed militia group that hit a military base in Iraq, the Pentagon said.

On Wednesday, Iranian-backed militia groups in Iraq killed two U.S. troops and one British soldier. Earlier Thursday top Pentagon officials said “all options are on the table” for a response.

“The United States will not tolerate attacks against our people, our interests, or our allies,” Secretary of Defense Mark Esper Mark EsperTop admiral: 'No condition' where US should conduct nuclear test 'at this time' Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Oldest living US World War II veteran turns 111 MORE said in a statement. “As we have demonstrated in recent months, we will take any action necessary to protect our forces in Iraq and the region.”

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The U.S.-led coalition in Iraq on Wednesday evening announced that 18 Katyusha rockets hit Camp Taji north of Baghdad, killing three and wounding 12.

"The death of two US service members at the hands of an Iranian-backed militia demands action," former national security adviser John Bolton John BoltonDiplomacy with China is good for America The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep DOJ launches probe into Bolton book for possible classified information disclosures MORE tweeted. "Iran's continued capability to strike at our forces through regional proxies demonstrates the need for prompt retaliation, not simply relying on 'maximum pressure.'"