GRAND CANYON NATIONAL PARK, Ariz. (AP) — An 18-year-old who was among a group of eight hikers that had run out of water at the Grand Canyon has died.

The National Park Service says rafters on the Colorado River were flagged down by a hiking group Thursday morning about 30 miles downstream from Lees Ferry. The hikers told the rafters that they were out of water and needed help.

Park Service rangers then received a report that one of the eight hikers was dead.

A paramedic flown to the scene found the group about halfway down a trail known as the Shinumo Wash Route. The dead 18-year-old was located about a mile from the rest of the party and his body was flown out by a Park Service helicopter.

The service and Navajo Nation police will jointly investigate into the incident.