Montreal police are asking potential witnesses of the city's 9th homicide to contact them.

Investigators from the Major Crimes squad said they're looking for three suspects who set a fire in a condo complex in Lasalle at 10:30 p.m. on May 15, 2018 that ended up killing a 61-year-old woman. 

The SPVM wants witnesses or anyone who took photos of the scene to send their image and video files to images@spvm.qc.ca. 

"We were able to gather information that possibly three suspects were on the scene. We're talking about three persons with black skin that were seen leaving," said Const. Raphael Bergeron.

Officers went door-to-door in the area on Tuesday in an attempt to locate witneses.

In addition, a command post was set up at the corner of Chouinard and Bois-des-Caryers on Tuesday, with members of the Major Crimes squad, the arson squad, and CAVAC on site.

Anyone else with non-urgent information can contact Info-Crime Montreal at 514-393-1133, or online.