MARYSVILLE, Wash. -

Marysville police are investigating a stabbing following a confrontation between several teens Sunday evening.
   
Police said a 17-year-old boy and a 14-year-old boy were in a fistfight when a 15-year-old jumped into the fight and stabbed the older teen.
   
The victim was taken to a local hospital with injuries that are considered life-threatening.
   
Police took the other two into custody. They will be booked into the Denney Juvenile Justice Center in Everett for assault.