Vancouver, British Columbia ? Another human foot was found Wednesday on a British Columbia shoreline, the second this week and the sixth within a year in a bizarre mystery that has confounded police.

Like most of the others, it was a right foot encased in a running shoe, said Sgt. Mike Tresoor of the Royal Canadian Mounted Police. He said a citizen spotted it on a beach and no other remains were found.

The latest find and most of the others were recovered within a few miles of each other along island shorelines in the Strait of Georgia, which lies to the south and west of the provincial capital of Vancouver.

Authorities say they haven’t reached any conclusions about the origin of the feet but are working to determine if there are any links to any other partial remains recovered in the province.

“Too my knowledge, we have not encountered anything like this,” RCMP spokeswoman Annie Linteau told The Associated Press Wednesday evening. She declined to speculate if foul play was involved.