Several U.S. service members injured in missile attack at Al-Asad Airbase in Iraq, Pentagon says

Several U.S. service members were injured in a ballistic missile attack by Iranian-backed militias on Al-Asad Airbase in Iraq, Pentagon officials said Monday.  

The attack Sunday night on U.S. and coalition forces involved a close-range ballistic missile and resulted in eight injuries and minor infrastructural damage, Brig. Gen. Pat Ryder, a Pentagon spokesperson, said in a statement. 

U.S. military responded with a retaliatory strike, which was not pre-planned, killing several Iranian-backed militia personnel, CBS News learned.