A 16-year-old boy was in custody Tuesday, accused of stabbing multiple classmates at a Utah high school before stabbing himself, according to police.

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Five students suffered wounds ranging from critical to fair during the attack at Mountain View High School in Orem, police said. It happened just before 8 a.m. local time in a boys locker room, according to Alpine School District officials.

All five injured students -- and the suspected attacker, also a student -- were taken to hospitals for treatment of their wounds. None appeared to be life-threatening, the school district said.

Orem police did not immediately identify the teen suspected of stabbing his classmates or share the motivation behind the attacks. Authorities said a school resource officer took the suspect into custody by 8:45 a.m.

The school was placed under lockdown as police launched an investigation, but the lockdown was lifted by 9:30 a.m.

"Law enforcement has determined the school safe and the school will resume normal activities," school officials said.

They were expected to release more information at a news conference scheduled for 11 a.m.