Four police officers have been shot dead near the McChord Air Force Base in Washington State, US media report.
A sheriff's department spokesman told KOMO-TV that the officers were shot at the east side of the air force base.
The officers were ambushed as they were at a coffee shop, according to a report from CNN.
A sheriff spokesman described the shooting as an ambush. The air force base is in Pierce County, 40 miles south of Seattle.