Authorities on Guemes Island in Washington are investigating the discovery of 21 skinned canine carcasses that have washed ashore in recent days.

The remains were found along beaches and in the water, prompting forensic necropsies and DNA testing to determine their origin and species.

Officials say the animals appear to be similar in size and condition, with some showing signs such as missing paws and markings like orange twine, but no clear evidence yet explains their deaths.

The cause and source of the carcasses remain unknown, and residents have been left unsettled by the unusual findings, NBC News has reported.

The investigation is ongoing as the small island community awaits answers.