Yellowstone National Park entrance sign. (NPS)

(Yellowstone National Park, Wyo.) – A search is underway in Yellowstone National Park for a young man from Georgia who was swept down the Yellowstone River near Tower Junction Monday evening.

Three young concession employees reportedly used inner tubes to float the Lamar River on Monday.  Floating the river is prohibited by park regulations due to safety concerns.

Shortly after reaching the confluence of the Lamar and Yellowstone Rivers, two of the men got out of the water.

The third man, 22 year old Darien Latty, was last seen about7:30 p.m. Monday being propelled downstream by the rushing water, without either an inner tube or life jacket.

Initial search efforts Monday evening failed to turn up any sign of Latty, who is described as 5 feet 7 inches tall, 140 pounds, with brown hair and brown eyes.

Search efforts were increased Tuesday, with a helicopter, 3 dog teams, and several small groups of people searching the Yellowstone River corridor from Tower Junction downstream to Gardiner, Montana.  Approximately 50 people had been dedicated to the search effort as of mid-afternoon Tuesday.

Anyone with information regarding the whereabouts of Darien Latty is asked to call Yellowstone National Park at 307-344-2642.

–Provided by Yellowstone National Park