12/18/2014 06:35 EST | Updated 02/17/2015 05:59 EST

Homicide victims are getting younger, police say

Twenty-one homicides from this year remain unsolved in Toronto, including the shooting deaths of two teenagers near a west-end high school.

On Oct. 6, 2013, 17-year-old Zaid Youssef and 15-year-old Michael Menjivar were shot outside a high school in the Islington Avenue and Dixon Road area. Both teens succumbed to their injuries.

Toronto police have said they were innocent bystanders near the scene of a fight.

Police would later make an arrest related to the events that unfolded that day, but investigators say they are still looking for another suspect.

"As far as I'm concerned, as long as that individual is out there, walking around, anybody's that’s near him is in danger because that person is a loose cannon," said Insp. Greg McLane, the head of the homicide squad, in an interview with CBC News.

Total homicide numbers have stayed relatively constant for the last few years.

However, McLane said a trend has emerged in which homicide victims are getting younger — some 30 people under the age of 18 have been slain in Toronto since the start of 2010.

Police blame gang activity.

"It is alarming because I also see that they're not just on the cusp of being 17 and 18, the ages of these individuals are like 14 and 15," he said.

Click on the video above to see a full report from the CBC's Sue Sgambati.