A teen is in hospital with serious injuries following a stabbing on a bus outside a southwest Calgary high school.

Emergency crews were called to the area of Henry Wise Wood High School, near Elbow Drive and 75 Avenue SW, around 2:05 p.m. for reports of an assault with a weapon.

Police says a teenager was stabbed on a transit bus at a bus stop across the street from the school. Images from the scene show a city bus surrounded by police tape.

A 17-year-old boy was taken to hospital and is in stable condition following surgery.

A suspect fled the scene but was located shortly after and is now in custody, according to police. CPS Duty Insp. Darren Smith says the suspect is known to police.

Smith says it is believed the victim and the suspect knew each other, but investigators are still looking into a motive. Police could not confirm if either are students at the school.

“We don’t actually know the relationship these two have to the school,” says Smith. “It occurred on a bus that had stopped outside Henry Wise Wood. This doesn’t appear to be a random attack in any way, this appears targeted.”

Henry Wise Wood was temporarily in lockdown following the incident, and the Calgary Board of Education (CBE) tells CityNews the lockdown was lifted before 3 p.m. after officers went in the school to ensure the suspect was not inside.

“We know that a number of students witnessed this event,” reads a CBE statement. “This may affect individuals in different ways, and it is important to seek support when needed.”

The board says supports will be available for students at the school on Monday.

Anyone with additional information on the incident is being asked to contact Calgary police, or submit tips to CrimeStoppers anonymously.