Toronto police arrested a suspect Saturday afternoon after one person on board a TTC bus in North York was stabbed.
Emergency crews were called to a stabbing in the area of Keele Street and Wilson Avenue after 2 p.m.
When officers arrived, they located a male victim, believed to be in his teens, suffering from multiple stab wounds.
Toronto paramedics say he was transported to a trauma centre with serious, possibly life-threatening injuries.
Officers at the scene took one man into custody, police say. It is not known what led to the stabbing.
