06/17/2015 09:14 EDT | Updated 06/17/2016 05:59 EDT

Montreal man in critical condition after fight at Papineau and Ontario

Montreal police are investigating after an early morning fight between two men in an apartment building at Ontario Street and Papineau Avenue left a 37-year-old man critically injured.

Montreal police spokesman Const. Abdullah Emran says police were called to the building just after 2.a.m. Wednesday.

Emran said it appears the 37-year-old attacked another man, 30.  The victim then used what Emran called a "weapon of opportunity" to attack his assailant.

Both men were sent to hospital.