The demonstrators, angry at U.S. air strikes against the Tehran-backed Kataib Hezbollah group that killed at least 25 people, threw stones at the building while U.S. forces stationed on the rooftops fired tear gas to disperse them.

Secretary of State Mike Pompeo said the strikes send the message that the U.S. will not tolerate actions by Iran that jeopardize American lives.

Tuesday's attack occurred after forces supporting Syrian President Bashar Assad entered an area near a coalition base, the Pentagon said.