Toronto police have arrested a man alleged to have stabbed two people while using the city's transit system.

The first incident happened early Sunday morning on a Toronto Transit Commission bus in the city's west end.

Police allege a man snapped the head off a toothbrush and used it to stab a bus driver.

The second incident occurred hours later on Sunday in a pedestrian tunnel at the Spadina subway station where a man was stabbed with an unknown object.

Police say a suspect identified as 22-year-old Liam Mitchell McCallum was arrested late Monday night without incident.

Police say he faces a number of charges, but did not elaborate, saying further details would be announced Tuesday morning.