A brazen daylight shooting aboard a TTC bus Monday afternoon sent passengers stampeding off the bus and left one teenager in hospital with injuries to his hip.

The shooting took place on a bus near St. Clair and Oakwood Avenues shortly after 1 p.m. Monday, says Toronto Police Const. Wendy Drummond.

Const. Tony Vella says the shooting happened when a verbal altercation between three acquaintances turned physical. There were 15 other people on the bus at the time.

Officers accompanied by police dogs are combing the neighbourhood for two suspects and are advising residents in the area to stay inside with their doors and windows locked.

"If you happen to see someone on your property who obviously doesn't belong there, call police," Drummond advised area residents.

The 17-year-old victim was found with a gunshot wound, but his injuries are not believed to be life-threatening.

The first suspect is described as a black male, about 40-years-old, six foot one with a thin build and facial hair. He may be armed with a gun.

The second suspect is described as a black male in his early thirties, about five foot nine and he was clean shaven.

Both suspects were last seen heading southbound on Oakwood Avenue.

The bus involved with the shooting remains parked on the side of the mainly residential street and is surrounded by yellow police tape. Several roads in the area have been closed to facilitate the police search.

Despite today's incident and a recent daylight shooting at the Osgoode subway station, TTC Chair Adam Giambrone tells CP24 the system is safe.

He says the increased use of surveillance cameras throughout the system has helped make the TTC safer.

"They've been very effective in leading to the arrest and prosecution of individuals who committed crime," he says, adding that surveillance footage helped in the arrest of a man who was wanted in connection with the Osgoode shooting.

Giambrone also says police are adding 40 officers to patrol the transit system in addition to 104 TTC special constables.

"It's ultimately the police chief who will make the decision about what sort of security is needed on the system," Giambrone says. "(The chief) is the one who is in charge of safety and security across the city, including the TTC."

Anyone with information on this shooting should call police at (416) 808-1300 or Crime Stoppers at (416) 222-TIPS.