EVERETT, Wash. -

Snohomish County sheriff's detectives are looking for a man who slashed another man's throat overnight on the Tulalip Reservation near Marysville.

The sheriff's office says the 20-year-old victim was airlifted to Harborview Medical Center in Seattle and was in serious condition Friday.

Deputies and officers with police dogs searched the area of the assault but were unable to find the suspect.

The sheriff's office says both men are believed to be homeless.