The 21-year-old man, who is a student at the school, had allegedly made previous threats concerning the school and students, police said.

Police officers and school security, who were on campus Wednesday morning to investigate Friday's threats, stopped the man in the cafeteria. When confronted by police, officers said the man gave them false identification and tried to flee the scene.

Police said when they reached the man, he became combative and resisted police.

The man was arrested and a knife was confiscated from him. He is expected to be booked into the King County Jail on investigation of assault and threats, Officer Jeff Kappel with Seattle police said.

The man's arrest was captured on camera and the video was posted on the YouTube.com Web site.

The officers received minor injuries. The man who was arrested was not hurt.