Reports say six U.S. F-16 fighter jets have arrived at Turkey’s southern air base to join the U.S.-led coalition fight against Islamic State militants.

The U.S. Mission to NATO said on Twitter on Sunday that the F-16s have been deployed at Incirlik Air Base. It didn’t provide further details.

Turkey’s private Dogan news agency reported that about 300 airmen from the 31st Fighter Wing had also arrived at the air base on Sunday.

Turkey agreed to allow the U.S. to use the strategically located base last month, ending months of reluctance. Armed drones struck Islamic State positions last week and Turkey said an “extensive” fight against the extremists would soon begin.

Turkish military and government officials couldn’t immediately be reached for comment.

(AP)