A man firing a handgun into restaurants and cafes as he walked along a Toronto street shot 14 people, killing one of them, before dying after an exchange of gunfire with police late Sunday, police said.
Police Chief Mark Saunders said the shooting in the city's Greektown neighborhood was not random and he did not rule out terrorism as a motive.
"Other than the shooter we have a young lady that is deceased," Saunders said.
Saunders also said a young girl was in critical condition.
The condition of the other victims was not yet known, police spokesman Mark Pugash said. He said it was too early to say whether the shooting was an act of terrorism.
A video from one witness shows a man dressed in black clothes and a black hat walking quickly and firing three shots from the sidewalk into at least one shop or restaurant. Toronto's Greektown is a lively residential area with crowded Greek restaurants and cafes.
Witnesses heard many shots and described the suspect walking past restaurants and cafes and patios on both sides of the street and firing into them.
John Tulloch said he and his brother had just gotten out of their car when he heard about 20 to 30 gunshots.
"We just ran. We saw people starting to run so we just ran," he said.
An army of police, paramedics and other first responders soon arrived, while residents, some in pajamas, emerged from their homes to see what was happening.
Toronto Councillor Paula Fletcher told TV station CP24 she heard that the gunman was emotionally disturbed.
"It's not gang-related. It looks like someone who is very disturbed," Fletcher said.
Councillor Mary Fragedakis also said she heard the gunman was disturbed.
Fletcher said for this to happen in an area where families gather for dinner is a tragedy.
Mass shootings are rare in Canada's largest city.
"We were so use to living in a city where these things didn't happen," Toronto Mayor John Tory said. "But there are things that happen nowadays and they are just unspeakable."
Over the weekend, Toronto police deployed dozens of additional officers to deal with a recent increase in gun violence in the city.
"Guns are too readily available to too many people," Tory said.
Police urged people to come forward with video or witness testimony.
The mass shooting comes a few months after a driver of a van plowed into pedestrians on a Toronto sidewalk, killing 10 people and injuring 14. Authorities have not disclosed a motive, but they have said the arrested driver, Alek Minassian, posted a message on social media referencing a misogynistic online community before the attack.