Video footage showed the police officer staring down the suspect at gunpoint in the middle of a street, while the man pointed what appeared to be a gun and shouted "Kill me." The video, obtained by CBC News, showed the suspect repeatedly pulling an object from his side and aiming at police.
The arrest was praised as a welcome example of police restraint in the midst of chaos, coming just minutes after a white rental van plowed into a lunchtime crowd in north Toronto, killing 10 people and injuring 15 in one of the most violent incidents in Canadian history.
As the suspect shouted "Kill me," the officer replied, "No, get down." When the suspect said, "I have a gun in my pocket," the officer responded: "I don't care. Get down."
Toronto police identified the man arrested as Alek Minassian, 25, of Richmond Hill, a neighbourhood close to Toronto.
The Toronto Police Service declined to name the officer involved in the stand-off, but Clement said he appeared to be a "very seasoned and mature officer."
"I would say this individual met the right police officer," Clement said. "Nobody knows how they're going to react. In this situation a lot of it comes down to muscle memory. This guy reacted in a very mature manner."
Toronto Police Chief Mark Saunders said the officer's behaviour reflected the "high caliber of training that takes place.
"They are taught to use as little force as possible in any given situation," he said.
The non-violent end to the standoff won plaudits on social media.
"Wow, at how these Canadian cops brought in this suspected killer," said Twitter user Stuart A. Thompson in a posting.
Police in the United States have been criticized for being too quick to pull the trigger after a series of high-profile police shootings and deaths of suspects during arrest.
Witnesses in Toronto expressed horror at the murders.
Young Lee, a 56-year-old attorney, looked out his third-floor office window on Yonge Street and was shocked to see medics attempting to resuscitate two of the victims.
"I've never seen violence like this here in Toronto," Lee said. "I felt a mix of rage and a lot of sympathy for the victims."
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
Follow NDTV for latest election news and live coverage of assembly elections 2019 in Maharashtra and Haryana.
Subscribe to our YouTube channel, like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.