WASHINGTON (AP) — A senior military official says that American military advisory teams will now go to Iraq’s western Anbar province where Islamic State militants have been gaining ground and slaying men, women and children.

The teams are part of President Barack Obama’s new directive to expand the U.S. mission in Iraq by deploying another 1,500 U.S. troops to serve as advisers, trainers and security personnel.

The official said it is likely that the bulk of the additional troops will be in Iraq by the end of the year. This would bring the total U.S. forces in Iraq to about 3,100, and would mark their first return to Anbar since the war ended.

The official was not authorized to discuss the matter publicly so spoke on condition of anonymity.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP’s earlier story is below.

President Barack Obama is authorizing the U.S. military to deploy up to 1,500 more troops to Iraq as part of the mission to combat the Islamic State group.

Obama is also asking Congress for more than $5 billion to help fund the fight.

The White House says the troops won’t serve in a combat role, but will train, advise and assist Iraqi military and Kurdish forces fighting IS.

White House press secretary Josh Earnest says Obama has also authorized the additional personnel to operate at Iraqi military facilities outside Baghdad and Erbil. Until now, U.S. troops have been operating a joint operation center setup with Iraqi forces there.

The announcement is part of a $5.6 billion funding request to Congress and came just after Obama met with congressional leaders Friday.