An unusual daytime rocket attack on a US military base in Iraq injured at least two Iraqi soldiers Saturday — just days after a similar strike killed two Americans.

The barrage of at least a dozen explosives hit Camp Taji north of Baghdad, Iraqi officials said, landing in an area where coalition service members are housed and on an airstrip operated by Iraqi forces.

The attack came two days after the US launched retaliatory airstrikes against Iran-backed Iraqi militias that the Pentagon says is responsible for Wednesday’s attack on Camp Taji, which killed three coalition soldiers — two Americans and one British soldier.

Senior US officials have said that the killing of Americans in Iraq was a red line that would spark swift reprisals.