Police have shot and killed an armed man at Canada's busiest courthouse on the outskirts of Toronto after he entered the secure building and left an officer wounded.
The unidentified shooter walked into the courthouse in Brampton, Ontario at about 11am on Friday and "discharged a firearm," injuring the policeman, a special investigative unit said in a statement.
An exchange of fire followed and the assailant was hit and later pronounced dead, the SIU said.
"The bad guy is dead," a policeman at the scene was quoted by the National Post as saying.
"The extent of the injuries (to the policeman) are not yet known," Peel Regional Police said on Twitter, while a police spokeswoman confirmed to public broadcaster CBC that "shots were fired within the courthouse."
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The spokeswoman said the packed building was immediately locked down, and the injured officer was rushed to hospital.
The courthouse is situated 43 kilometres from downtown Toronto.
Canadian television showed images from a news helicopter of an ambulance escorted by several police cars speeding down a highway toward a local hospital, where a uniformed man was then taken on a stretcher into the emergency room.
Dozens of police cars, meanwhile, could be seen surrounding the courthouse.
Students who witnessed the shooting told Canadian media that as many as half a dozen shots rang out, with police later conducting a room by room search.
The five-storey courthouse, with 34 courtrooms for both the Ontario and Superior Courts of Justice, opened in 2000.
It includes metal detectors at the entrance and was where several high profile criminal cases have been heard, including the trial of the so-called Toronto 18 group of Islamic extremists convicted of plotting in 2006 to bomb a stock exchange, government offices and a military base, as well as storm parliament and behead the prime minister.
