There was a startling discovery Thursday morning near Twin Buttes Reservoir in San Angelo. According to local authorities, two deer hunters came across a human skull and bones. The Tom Green County Sheriff's Office was called out to investigate. The investigation is expected to last two or three days. Authorities did confirm that the remains were found on the south shore of the north pool of the reservoir. The Texas Rangers will be heading up the rest of the investigation. We will continue to follow this developing story and bring you updates as they are made available.