Iran holds drone combat exercise drills

Hundreds of unmanned aircraft, including "suicide drones", were to be used in the drill, according to Iranian news agencies, with exercises in both air-to-air and air-to-ground combat.

The move comes amid high tension between Iran and the United States.

On Wednesday (December 30), the U.S. military flew two nuclear-capable B-52 bombers to the Middle East in a message of deterrence to Iran.