A 19-year-old man has been taken to hospital with undetermined injuries after he was stabbed Friday afternoon in a parked school bus at Sackville High School, according to Halifax District RCMP.

The man was not a student, according to police.

No one else was injured, and police do not consider this a random act.

Two non-students got onto the bus to confront a student or group of students, according to Doug Hadley from the Halifax Regional School Board.

A fight broke out and one of the non-students was stabbed, Hadley said.

He said police held some students back who may have witnessed the stabbing.

Hadley wasn't sure how many people were on the bus at the time.

The Mounties are currently looking for a suspect.

They're asking anyone with information about the suspect or assault to call 902-490-5020, or Nova Scotia Crime Stoppers at 1-800-222-8477.