Canada

Photo: The Canadian Press. All rights reserved.

A Police search dog searches the banks of the Credit River in Hewick Meadows Park in Mississauga, Ont., after police discovered a female severed head on Thursday August 16, 2012. THE CANADIAN PRESS/Aaron Vincent Elkaim

Police are back at a park west of Toronto where human remains have been found.

A head and foot were found earlier this week and two hands were found Friday in the Credit River that flows through Hewick Meadows Park in Mississauga.

Peel regional police say it's not yet known if the left and right hands are from the same person as the foot and head, but they add it seems safe to assume so.

Sgt. Pete Brandwood says he's optimistic more evidence will emerge this weekend as police officers and other searchers scour the area. Police say identifying the body is a priority.

Authorities discovered a woman's head Thursday -- a day after hikers came across a woman's severed foot.

Police can't say if the body parts were placed where they were found or if they drifted there from another point upstream.