A gunman burst into a coffeehouse Sunday and opened fire on four police officers as they sat working on their laptops, killing the three men and one woman in what an official described as a targeted ambush.
Pierce County Sheriff's spokesman Ed Troyer said officers were looking for one male suspect who fled the scene and haven't ruled out an accomplice, possibly a getaway driver.
It wasn't clear whether the officers even had time to draw their weapons to return fire, Troyer said.
''This was more of an execution. Walk in with the specific mindset to shoot police officers,'' Troyer said.
Troyer said the officers -- all from the Lakewood Police Department -- were catching up on paperwork at the beginning of their shifts when they were attacked at 8:15 a.m. Sunday.
Troyer said the attack was clearly targeted at the officers, not a robbery gone bad.
''There were marked patrol cars outside and they were all in uniform,'' Troyer said.
With no known suspects, there was no indication of any connection with the Halloween night shooting of a Seattle police officer. The suspect in that shooting remains hospitalized.
''We won't know if it's a copycat effect or what it was until we get the case solved,'' Troyer said. ''We don't even have a suspect ID right now.''