Updated

Police said there is a good possibility that a woman's torso found floating near Niagara Falls last week could have come from the U.S.

They called on the public to check on female family members, co-workers or neighbors they haven't heard from in some time. Police have classified the case as a homicide investigation.

A tourist spotted the torso near the base of the falls last Wednesday.

New York State Police Capt. Steven Nigrelli said Tuesday that because the U.S. shares the river with Canada, it's possible the person may have entered the water from there.

Police have said the case is not related to body parts found in Toronto earlier in August. Such cases have received extra attention after porn actor Luka Magnotta was accused of dismembering a Chinese student in Montreal and mailing his body parts to political parties and a school earlier this year.