Video by Radio-Canada captured police chasing and arresting one of the suspects in an alley near the scene.
Police say the suspects broke into a house near De L'Eglise Avenue and Laurendeau Street around 1:30 a.m. and assaulted one of the residents.
The 21-year-old man was taken to hospital with unspecified injuries.
Police arrived on scene just as the suspects were exiting the house.
Three suspects were arrested in a vehicle and a third was captured by police in an alley after fleeing on foot.
Police also found a suspicious package with the suspect who was caught in the alley. Officers called in the bomb squad to assess the material inside.
The four suspects are aged 19 to 22 and are known to police, a spokesperson said.