People have been captured running in panic from a parade celebrating the Toronto Raptors' victory as shots were fired.
Toronto Police say two people have been injured and two more were arrested amid the melee. The injuries are serious but not thought to be life-threatening.
Millions are out in the streets of downtown Toronto celebrating the Canadian team's historic NBA championship title win.
Toronto Police said on Twitter they have two people in custody and officers have recovered two firearms as they responded to reports of a a woman shot in Nathan Phillip's Square, where crowds have been captured surging in panic.
Footage shows the huge crowd heaving as people scream.
According to reports gunshots were heard in the square around 4pm local-time.
A bystander told the Toronto Star he was standing in the crowd when he heard popping sounds.
“We tried our best to escape,” he said. “We saw a lady get trampled, a pregnant woman fall. We saw some kids getting trampled and parents trying to protect them.”
Police said they are investigating the incident around Bay and Albert Streets.
According to reports more than two million people are on the city's streets celebrating the Raptors' victory.
Canadian PM Justin Trudeau was in attendance at the parade.
