There's a heavy police presence outside Toronto's Pearson International Airport on Thursday morning. At this point, officials have not said what led to the response. (Cathy Perry/CBC)
''Highway 409 to Terminal 1 departures is closed due to a police investigation, Ontario Provincial Police said in a post on X.
The 900 Airport Express bus is detouring via Terminal 3 due to police activity, the TTC said.''

''Images from the scene show a heavy police presence with several Peel Regional Police vehicles parked outside Canada's largest airport. CBC News crews spotted at least a dozen police cars en route to the departures area of Terminal 1.
A number of passengers were seen walking up to the road with their luggage to get to Terminal 1. It is unclear whether flights have been impacted by the incident.''
Apr 24, 2025
CP24's Chopper 24 on scene of an active investigation at Pearson Airport.
Toronto Paramedics tell CityNews they arrived at Pearson at 7 a.m. on Thursday. Police later confirmed a man had been shot.
toronto.citynews.ca
''Peel Regional Police say a man was shot and injured by an officer at Toronto Pearson International Airport on Thursday, leading to a chaotic scene at Terminal 1.
Toronto Paramedics told CityNews that first responders arrived at the airport at 7 a.m. on Thursday.
Peel Regional Police later confirmed that an adult man was shot and injured by a responding officer. The Special Investigations Unit (SIU) has been notified. The man’s current condition is unknown.
A police spokesperson said the officer was uninjured. Authorities noted that this was an isolated incident and that there were no known threats to public safety.''