The U.S. government is expected to announce a troop reduction in Iraq shortly, two administration officials said on Friday. Negotiations between the Pentagon and Iraqi leaders have gone on for several months,

Last month’s raid In Iraq’s western Anbar Province resulted in the death of four top ISIS commanders, U.S. Central Command announced. The Aug. 29 mission, one of the biggest raids carried out under Operation Inherent Resolve, took out the terror group’s top commander in Iraq and 13 other fighters, and left seven American servicemembers injured.

The U.S. military said those killed in a joint assault by U.S. and Iraqi forces last month included the group’s top commander in Iraq and its leading bomb maker.