A dozen young people were taken to hospitals after overdosing on an unknown substance at a house party in central Washington, police said Saturday.
Three remained hospitalized Saturday, including one woman in serious condition at a hospital in Yakima, said Cle Elum Police Chief Scott Ferguson.
The investigation started late Friday when officers and Kittitas County sheriff's deputies received a report of a possible overdose victim at a nearby grocery store. Acting on information from the victim's friends, police went to the house party and found 11 more young people either passed out or semi-conscious.
Police also say they also interrupted a possible sexual assault in progress, according That suspect had been released by Saturday morning.
Police believe something may have been slipped into their drinks, and they expect toxicology tests on blood and urine samples taken from the victims to help determine what that might have been.
"We don't believe this was just a result of heavy drinking," Ferguson said.
Many of the 50 or so people present were underage students at Central Washington University, and Ferguson said college police, Cle Elum police and sheriff's deputies were continuing the investigation.