A teen is seriously injured after a stabbing broke out inside Yorkdale Shopping Centre on Monday evening.

It happened shortly before 5:30 p.m. at the entrance to Cineplex Cinemas at the north-end of the busy mall.

The victim sustained “very serious" injuries after being stabbed in the abdomen. He was rushed to a local trauma centre where he remains in non-life-threatening condition, investigators said.

“There are several units on scene searching in and around the entire area. It is unknown if the suspects are still in the mall,” Toronto police spokesperson Const. Allyson Douglas-Cook told CP24.

Investigators are searching for four suspects caught on surveillance video fleeing the scene using the TTC subway.

One suspect is described as a black male in his late teens or early 20s with afro-style hair and a light complexion. He was last seen wearing a red t-shirt with a white "U" on the front, a grey sweatshirt, grey sweatpants, and black and white running shoes.

The other suspect is described as a black male. He was last seen wearing prescription glasses, a black wave hat, black running shoes with white trim, black pants and a large grey Roots sweatshirt.

A female suspect is described as white and was seen wearing a yellow hooded jacket, black shirt and dark shoes.

The final suspect is described as a white, Asian male with shoulder length hair. He was last seen wearing a blue baseball hat with a yellow stripe running from front to back and a blue jacket.

No other injuries were reported and police said they believe the incident was isolated.

The motive for the stabbing is not yet known.

Police are asking anyone who witnessed the incident to come forward and speak with investigators.

“We are appealing to witnesses, anyone who may have seen anything – if they can give us a call at 32 Division with more information, that would be extremely helpful,” Douglas-Cook said.

The mall remains open, but police are advising people to avoid its north-end as they search for suspects.