The shooting happened just after 10pm Sunday, local time, when police were called to reports of shots being fired in the Greektown area.
Witnesses told the Toronto Star a man dressed in black had fired a gun multiple times, some estimating that he fired up to 20 shots.
Police said that a young girl is among the 14 people shot. She is said to be critically injured.
They also confirmed the gunman is dead.
Global News quoted an unnamed source as saying that the gunman had shot at police before shooting himself but this has not been confirmed by police.
The injured have been taken to various hospitals and an unconfirmed number of people are being treated at the scene.
Several blocks have been cordoned off.
Toronto police chief Mark Saunders said Now we have other than the shooter we have a young lady that is deceased right now and we have a young girl I believe eight or nine years old that is in critical.
We are looking at all possible motives… and not closing any doors.
Jody Steinhauer told CBC News she was at a restaurant with her family when she heard what sounded like 10 to 15 blasts of firecrackers.
She said she was told to run to the back of the restaurant, adding We started to hear people scream out front.
Another witness, who was identified as Katie, was returning from dinner with friends and driving when she saw the shooter firing what appeared to be a handgun.
We heard a loud bang and I just looked to my left and I saw a guy in a black hoodie, just standing there, pointing at one of the storefront windows and the glass was just shattered, she told the Toronto Sun.
He was firing multiple shots, we heard eight, if not more.
The 19-year-old said the shooter stood outside on the sidewalk, but didn’t appear to be using a rifle.
She said he appeared to be aiming directly into the restaurant.
It was like he was in a stance, his arms were straight out, she said.
It looked like he was firing straight in front of him. It looked very aimed.
Ontario premier Doug Ford said on Twitter My heart goes out to the victims and loved ones of the horrific act of gun violence in Toronto.
Thank you to all the first responders for acting quickly to help everyone affected.
The shooting comes as Toronto police increased their numbers in the city to tackle a recent increase in recent gun violence.
News Source SkyNews