Defense systems shot down an armed drone on Thursday over Erbil airport in northern Iraq, where U.S. and other international forces are stationed, Iraqi Kurdistan's counter-terrorism service said.

The Iraqi semi-autonomous Kurdistan region's security agency said in a statement an armed drone fired by "outlaw militia" against Erbil airport was shot down at 11:06 p.m. Iraq time.

The militia, named Islamic Resistance in Iraq, has claimed responsibility. 

(With input from Reuters)