The young girl, who had received critical injuries in the attack in the Danforth and Logan avenues area, on Sunday night has succumbed, the BBC reported.

The motive for the shooting is not clear yet, said police, who were appealing to witnesses for details.

Jeremy Cohn, a journalist with @globalnewsto, posted a footage from the scene, saying that "victims are spread across many blocks".

Jody Steinhauer told CBC News she was with her family in a restaurant in the area when she heard what sounded like 10 to 15 blasts of firecrackers. "We started to hear people scream out front," she said.

Some of the victims who were scattered across the ground for "many blocks", were treated at the scene, while others were taken to hospitals after the gunman dressed in black was seen firing his gun between 15 and 20 times.

The emergency services sent victims to trauma centres across the city just after the shooting started around 10 p.m. outside the restaurant on Danforth Avenue in Greektown, Toronto police Sergeant Glenn Russell told CNN.

Witnesses said they heard more than a dozen shots ring out from inside the busy restaurant. Paramedics confirmed to the media that the victims received "significant injuries" and one of them was a child.

Ten people were transported to various hospitals, including six to trauma hospitals, one to a paediatric trauma centre and one to another hospital, Toronto Paramedic Services told CNN partner CTV.

Fire Services was assisting with efforts, Toronto Fire Captain Adrian Ratushniak told CNN.

The police said it has taken witnesses from the scene by bus to be interviewed at nearby police stations.

Details of the incident were still sketchy.

The scene of the attack is about 14.5km from Yonge Street, where a motorist went on a ramming rampage on April 23, which left 10 people dead and another 15 injured.