Police are searching for a person they believe shot a 22-year-old man multiple times in North York Sunday night.

Shots were fired around 8:20 p.m. near Jane Street and Shoreham Drive, just west of York University's main campus. 

The victim was found by a passerby in the parking lot of Shoreham Public Sports and Wellness Academy and rushed to the trauma centre at Sunnybrook in critical condition, said Toronto police Insp. Anil Anand.

A male in his 20s is in custody and a gun was recovered by police. 

"All I can tell you right now is that he is being investigated with respect to this shooting," Anand told CBC News.

With the assistance of canine units, police are searching for a second person who fled northeast after the shooting. He was described as black, five feet ten-inches tall and wearing a grey hoodie. 

Investigators are currently reviewing any security footage that may have captured the incident, Anand said. 

It was the fourth shooting on what has been a violent day in the city. 

Earlier two people were injured in an apparent gunfight downtown. A short time after, police responded to the scene of a man shot multiple times in East York. There was also a homicide in the basement of a nail salon in Scarborough in the early morning hours.