Toronto police think they might have another murder to investigate after the body of a Parkdale resident was found in his downtown apartment Saturday night.

The man's body was found in the King and Dufferin Streets area just before 10:30 p.m. Police have not released his name yet.

Investigators call the death "suspicious." Homicide detectives have been called in to determine whether or not the man was murdered.

If it is a murder, it will be the city's 78th homicide victim of the year and the fourth man to be killed in Toronto this weekend.

Darryl Debassige was stabbed in an east-end apartment around 10 p.m. Friday night. The 35-year-old later died in hospital from his injuries.

Earlier on Friday, police in the Scarborough area were investigating two other murders that took place just hours apart. Police believe they are connected.

At around 1:30 p.m. police were called to the Birchmount Road and Bonis Avenue area for a shooting. Ryan Hyde, 19, was found sitting in his car riddled with bullets. An autopsy revealed he died from a gunshot wound to the stomach.

On Sunday, police said the man responsible for the shooting was later gunned down himself.

Kennado Walker, 25, was gunned down in a parking garage on Sheppard Avenue at around 8:13 p.m. Friday. An autopsy concluded a gunshot to the head killed Walker.

The Ajax resident was known by his friends as "Weezy" or "Squeeze."

"What we have is two individuals that were leading criminal high-risk lifestyles," homicide detective Stacy Gallant told reporters at a news conference Sunday afternoon. "They had an apparent dispute that led to both of them being killed."

Homicide detectives are currently reviewing video footage from the building's security cameras for clues. They have also obtained security footage from surrounding businesses.

CTV Toronto reported the two men were fighting over a prior assault.

"It appears this was some kind of retaliation between two groups," Gallant said. "We want to know where this retaliation was stemming from."

Anyone with information on any of these incidences are asked to call homicide detectives at 416-808-7400. Anonymous tips can be left with Crime Stoppers, at 416-222-TIPS.

With a report from CTV's Jim Junkin