A second victim has died after a gunman opened fire in a popular Toronto neighborhood late Sunday night.

Police said the second victim died Monday morning. Neither that victim nor the one who died overnight have been publicly identified.

The gunman is also dead, Toronto Police Chief Mark Saunders said. It was not immediately clear whether the assailant died from a self-inflicted gunshot wound or from police gunfire.

Now, as a dozen wounded victims try to recover from their injuries, police are trying to understand what prompted the deadly shootings.

Saunders said police are investigating "every possible motive, including terrorism."

The melee started shortly after 10 p.m. ET in Toronto's Greektown neighborhood. 

Resident Andrew Van Eek told CNN partner CBC that he heard gunfire and looked out his window.

"There was a lot of commotion in the street," he said. "I saw somebody come just down the sidewalk and shoot into Demetres restaurant."

Van Eek described the suspect as a white male in his 30s wearing black clothing.

Another witness told CNN partner CTV he heard about 20 shots and the sound of a weapon being reloaded repeatedly.

"And then I saw the carnage as I ran down the street here to kind of follow the gunfire," the man told CTV. "I saw at least four people shot."

Witness Jody Steinhauer was dining with her family at a Greek restaurant called Christina's when she heard what she thought was the sound of firecrackers. Then she was told to run to the back of the restaurant.

"We started to hear people scream out front," Steinhauer told CBC.

The crime scene stretched over a distance, the police chief said.

Witnesses were taken by buses to multiple offices to speak with investigators. Police asked witnesses or anyone with information to contact authorities.

BDST: 2120 HRS, JULY 23, 2018
AP