U.S. troops serving at the Al Asad air base in Iraq are being targeted with "regular" mortar and rocket fire from Islamic State (IS) terrorists, according to the Pentagon.
The increasingly dangerous situation for the 320 U.S. troops serving at the base is raising concern among Pentagon officials, according to Defense Department spokesman Col. Steven Warren.
While no soldiers have been injured by the IS attacks, the rockets and mortars are landing around the base's perimeter, according to CNN.
The Pentagon will not say if it is changing base security measures to account for the increased risk, according to CNN.