Kahnawake Peacekeepers are investigating human remains discovered Monday afternoon near the Mercier Bridge.
A construction worker found bones and a skull on the south shore, between routes 138 and 132.
The remains were hidden underneath saplings and branches, leading police to declare the area a crime scene.
A forensics investigator is examining the remains, and trying to determine whether they belong to a man or a woman, and the approximate age of the person.
Police hope that preliminary results will be available as of Thursday.