The group said in a statement that its fighters carried machine guns, grenades and assault rifles during the hour-long gunbattle, but that none of the militants were hurt.
Iraqi security forces were placed on high alert and American aircraft —unpiloted reconnaissance drones flying low, and fighter jets roaring high above —crossed the capital.
Two pairs of British Tornado fighter jets have taken off from the royal air force base of Akrotiri in Cyprus, defense ministry officials have not confirmed that the jets are heading for Syria.
Between 2011 and 2015, they had purchased everything from American made F15 fighters, M1 Abrams tanks, Apache attack helicopters and Patriot missile batteries.