LAKE MEAD NATIONAL RECREATION AREA, AZ - MAY 12: A tall bleached 'bathtub ring' is visible behind the Hoover Dam on May 12, 2015 in Lake Mead National Recreation Area, Arizona. As severe drought grips parts of the Western United States, Lake Mead, which was once the largest reservoir in the nation, has seen its surface elevation drop below 1,080 feet above sea level, its lowest level since the construction of the Hoover Dam in the 1930s. (Photo by Justin Sullivan/Getty Images)

LAS VEGAS (AP) — A week after a decades-old body was found in Lake Mead, authorities are working to identify a second set of human remains. Two sisters from Henderson were paddleboarding in Callville Bay Saturday when they spotted the remains. The National Park Service confirmed they are human skeletal remains. Las Vegas police are not treating it has a homicide case. The remains are currently with the Clark County Coroner’s Office. The discovery comes after a body in a barrel was found in the lake that encompasses both Nevada and Arizona. In that case, police say the body was a man who had been shot in the ’70s or ’80s.