An Orange County woman discovered a human skull fragment on a beach in Oceanside, prompting an investigation by local authorities and heritage officials.

Katherine Kinnison, a resident of San Clemente, was walking near Linda Lane Beach on Wednesday when she noticed an object partially buried in the sand. Upon closer inspection, she identified the piece as the lower half of a jawbone with four teeth still intact. Initially mistaking it for animal remains, Kinnison quickly realized it was human and contacted nearby lifeguards, who then informed the Orange County Sheriff’s Department.

Authorities say the fragment has been transferred to the county coroner’s office, which is collaborating with the Native American Heritage Committee to determine its origin. Sgt. Lizbeth Gwisdalla of the sheriff’s department indicated that officials believe the remains are of Native American heritage and have found no evidence of foul play or suspicious circumstances surrounding the discovery.

Kinnison suggested that recent high tides and sand replenishment efforts along the shoreline could have exposed the jawbone after it had been buried for some time. She noted that while she has frequently walked the beach and found various animal bones before, this was her most unusual finding to date.

The location where the fragment was uncovered falls within the traditional territory of the Juaneño Band of Mission Indians, Acjachemen Nation, an indigenous group historically inhabiting portions of Orange County. The involvement of heritage officials aims to ensure the remains are handled respectfully and in accordance with cultural and legal protocols.

At this stage, the investigation focuses on confirming the origin and age of the fragment, with no further details released pending analysis by the coroner’s office and the Native American Heritage Committee.