WASHINGTON (Reuters) - A detachment of U.S. Marines is on the ground in Iraq to support U.S. and coalition efforts against Islamic State, the U.S. military said on Sunday.

A group of Marines from the 26th Marine Expeditionary Unit, or MEU, will add to the U.S. forces already in Iraq battling Islamic State, it said.

The 26th MEU is currently deployed in the U.S. 5th Fleet area of operations, which covers the Gulf, Red Sea, Arabian Sea, and parts of the Indian Ocean.