The OPP are treating a death in Sioux Lookout as a homicide.
A 40 year old woman was pronounced dead on Friday.
A post-mortem on Adrianna Bottle of Sioux Lookout will be performed in Toronto to determine the cause of death.
Investigators don't believe there is a danger to the public, but police say there will be an increased presence in the area.
The OPP's North West Region Crime Unit is in charge of the investigation under the direction of the Criminal Investigation Branch.