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More human remains discovered at shrinking Lake Mead

The four discoveries have people speculating about long-unsolved cases in nearby Las Vegas.

LAS VEGAS — More human remains have been found at the Lake Mead National Recreation Area east of Las Vegas, authorities said Sunday.

It’s the fourth time since May that remains have been uncovered as the lake’s shoreline retreats at the shrinking reservoir between Nevada and Arizona.

RELATED: Haunting photos show boat graveyard in shrunken Lake Mead

National Park Service officials said rangers were called around 11 a.m. Saturday after skeletal remains were discovered at Swim Beach.

Rangers and a Las Vegas Metropolitan Police dive team set up a perimeter to retrieve the remains.

Park Service officials said the Clark County Medical Examiner’s Office will try to determine the time, cause and manner of death as investigators review missing persons records.

On May 1, a barrel containing human remains was found near Hemenway Harbor. Police believe the remains were that of a man who died from a gunshot wound and the body was likely dumped in the mid-1970s to early 1980s.

Less than a week later, authorities say human skeletal remains were found at Calville Bay.

More recently, partial human remains were found in the Boulder Beach area on July 25.

RELATED: 3rd set of human remains found at Lake Mead amid drought

Police have speculated that more remains may be discovered as the water level at Lake Mead continues to recede.

The discoveries have prompted speculation about long-unsolved missing person and murder cases dating back decades — to organized crime and the early days of Las Vegas, which is just a 30-minute drive from the lake.

The lake surface has dropped more than 170 feet since the reservoir was full in 1983.

The drop in the lake level comes while a vast majority of peer-reviewed science says the world is warming, mainly because of rising levels of carbon dioxide and other greenhouse gases in the atmosphere.

Scientists say the U.S. West, including the Colorado River basin, has become warmer and drier in the past 30 years.

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