The men, 22 and 37, were in a car that struck another car about 7:30 p.m. in the 24000 block of Wallitner Road, about six miles east of town.
Both men were taken to local hospitals, Snohomish County sheriff's spokeswoman Shari Ireton said. Two people in the second car were treated on scene for minor injuries.
Detectives were investigating. Alcohol was believed to be a factor.
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