The Snohomish County Sheriff's Office is investigating a stabbing in Lynnwood. It happened around 4:00 a.m. Thursday at the Westburg RV & Mobile Home Park in the 15900 block of Highway 99.
Authorities think the three victims were roommates of the suspect. Officers have the suspect in custody.
Medics took one male victim to Harborview Medical Center in critical condition. A second victim, who is also a male, was taken to Harborview in serious condition. A female victim was treated for minor injuries.
The Snohomish County Sheriff's Office is looking into why the stabbing happened.
Stay with KING 5 News for updates.