Toronto police were busy with four shootings — including one outside a west-end hotel — Monday evening that sent two victims to hospital.

The gunplay started around 7:30 p.m., when police were called to the area of Midland and St. Clair avenues for reports of a shooting.

Emergency crews located one male victim at the scene. He was taken to hospital with serious injuries.

Police tweeted that the suspect in that shooting fled the scene in a black or dark grey car.

The second incident occurred around 9 p.m. at 101 Humber Boulevard, near Weston Road and Black Creek Drive, when police received "multiple" calls for "multiple gunshots."

Police found evidence of a shooting but no victim at a Toronto Community Housing complex on Humber Boulevard Monday night. (Jeremy Cohn/CBC)

Officers found blood and shell casings at the scene, but no victim.

The third shooting occurred around 10:30 p.m. at the Crowne Plaza Toronto Airport hotel, near Highway 27 and Dixon Road. Emergency crews found one man with a gunshot wound to his abdomen. He was transported to hospital in serious condition, Insp. Norm Proctor said.

A man was shot outside the Crowne Plaza Airport hotel around 10:30 last night, just as Gino Bibok was having a smoke out front. He says he was ‘shaking like a leaf.’ <a href="https://t.co/h4lkCq6AlT">pic.twitter.com/h4lkCq6AlT</a> —@LindaWardCBC

Witness Gino Bibok was outside the hotel smoking a cigarette when the shooting occurred.

"The guys start pushing each other," Bibok said. "The shooter tried to get away. But the guy kept following him and following him and pushing. And all of a sudden the shooter grabbed a gun … and just shot him in the stomach."

Finally, shortly before 11 p.m., police were called to Willowdale and Byng avenues for shots fired through the window of an apartment. No injuries were reported.

Proctor said investigators will review surveillance footage where it's available at all four shooting scenes, but encouraged witnesses to come forward.

"Police can't do this on their own," he said. "We need the help of witnesses."