(CNN) -- Young women at a party attended by about 50 Central Washington University students and other young people were the primary target of spiked drinks, authorities said Saturday.
The incident resulted in "multiple" reports of overdoses.
Some of the victims said they had consumed only one or two beverages before becoming ill, Cle Elum-Roslyn Police Chief Scott Ferguson said.
"Their level of intoxication just didn't seem to make sense," he told CNN Radio.
Central Washington University students who attended the party told CNN affiliate KOMO on Saturday that they believe a bottle of vodka at the party had been spiked with a date-rape drug known as "roofies".
They said several people at the party used vodka from the bottle to make mixed drinks. Those who brought their own alcohol, drank beer or didn't drink any alcohol were not affected, the students told KOMO.
Ferguson would not comment on the type of drug placed in the beverages. He said he will ask the Washington State Patrol Crime Laboratory to expedite test results.
Police do not know who spiked the drinks.
CNN
