Classes at Sto-Rox High School have been cancelled Wednesday after a student was shot while leaving the building Tuesday afternoon.Video: Watch Bob Hazen's reportPhotos: Shooting outside Sto-Rox High SchoolThe 17-year-old victim was shot in the arm during dismissal around 2:15 p.m., Stowe Township police said. The unknown shooter then ran away from the area possibly down Dale Street toward Broadway Street. Police brought at K-9 to the scene to try and get a scent from a bullet casing and the back of a cellphone which were left behind from the shooter. Pittsburgh's Action News 4 is told the victim was taken to the hospital and is expected to be OK.Stowe Township police said they do not believe the attack was prompted by anything that happened inside the school.“This might have just been an isolated incident, however we are still looking into this further," Chief Matthew Preininger.Officials said the victim ran back inside the school for help after being shot. Between 40 to 60 students were in the immediate area at the time as buses were loading.“It’s terrible. It’s sad that in today’s time and age we have to go through this type of process," said superintendent Terry DeCarbo. "But nobody’s immune. What we’ve learned today is no matter whether it’s a large urban setting, or a suburban setting such as this, no one is immune, and we’ll continue to be vigilant and making sure our students are safe.”All activities at Sto-Rox High School have been cancelled for Tuesday night.Refresh this page soon for updates.Get the WTAE Pittsburgh's Action News 4 App

Classes at Sto-Rox High School have been cancelled Wednesday after a student was shot while leaving the building Tuesday afternoon.

Video: Watch Bob Hazen's report

Photos: Shooting outside Sto-Rox High School

The 17-year-old victim was shot in the arm during dismissal around 2:15 p.m., Stowe Township police said. The unknown shooter then ran away from the area possibly down Dale Street toward Broadway Street.

Police brought at K-9 to the scene to try and get a scent from a bullet casing and the back of a cellphone which were left behind from the shooter.

Pittsburgh's Action News 4 is told the victim was taken to the hospital and is expected to be OK.

Stowe Township police said they do not believe the attack was prompted by anything that happened inside the school.

“This might have just been an isolated incident, however we are still looking into this further," Chief Matthew Preininger.

Officials said the victim ran back inside the school for help after being shot. Between 40 to 60 students were in the immediate area at the time as buses were loading.

“It’s terrible. It’s sad that in today’s time and age we have to go through this type of process," said superintendent Terry DeCarbo. "But nobody’s immune. What we’ve learned today is no matter whether it’s a large urban setting, or a suburban setting such as this, no one is immune, and we’ll continue to be vigilant and making sure our students are safe.”

All activities at Sto-Rox High School have been cancelled for Tuesday night.

Refresh this page soon for updates.