Another severed foot was found washed ashore in Canada over the weekend, bringing the total of mysterious feet found since 2007 to 13, the U.K. Daily Mail reports.
A group of young campers discovered a size 12 men's hiking boot on British Columbia's Sasamat Lake.
What separates this foot from the other 12 found in the British Columbia and Washington state was that it was found in fresh water, not salt water -- and it was found in a hiking boot, not a running shoe.
Police said they do not suspect foul play and believe that the feet detached naturally in the water.
Stephen Fonseca of the BC Coroners Service told the Daily Mail: "It would be very difficult for anybody to separate a body without leaving small impressions, little nicks on the bones."
Fonseca said that the previous cases have suggested that they are not dealing with a ruthless serial killer or another nefarious possibility.
Last month, two of the feet were found to belong to a missing Canadian woman who jumped to her death.
Feet are most likely the first part of the body to naturally detach once a body has been submerged underwater and in strong currents.
And in most cases, the feet may have floated to the surface because they were all in buoyant, lightweight rubber-soled sneakers. Heavier footwear would have sunk to the bottom.
In March, a woman walking near Powell River, British Columbia, found a running shoe containing remains.