One man is dead, another is missing after rafting accident in the Colorado River

One person has died and another is missing after a rafting trip on the Colorado River.

According to a Grand County Sheriff’s Office press release obtained by PEOPLE, on Saturday, June 1, three people, including a 56-year-old Denver-area man, a 61-year-old man and an unnamed third person, set out on a rafting trip near Yarmony Rapid, southwest of the rural town of Kremmling, Colorado.

Grand County officials received a 911 text message at about 3:40 p.m. saying one of the men was not breathing after the raft capsized, the release said. Officials from multiple agencies responded to the report, including personnel from Grand County Search and Rescue, Grand County Sheriff’s Office, Eagle County Sheriff’s Office, Bureau of Land Management (BLM) and several others.

According to the sheriff’s office, the unnamed 56-year-old man was resuscitated by emergency responders upon arrival and later pronounced dead. The cause and manner of death will be released “in due course,” the office said.

According to the press release, authorities used data from a device made by Garmin, a company that makes digital sports watches and other activity trackers, to determine that it was a rafting accident.

The 61-year-old man — whose identity will be released “pending notification of his immediate family,” according to the sheriff’s office — went missing after the raft capsized. The office said various teams, including personnel on rafts, on the ground nearby, rail vehicles and unmanned aerial systems (or drones), searched for the man following the 911 report, but he has not yet been found.

The third person was able to make it safely to shore, the sheriff’s office said in its news release. Authorities also added that they believe the rafters were not wearing personal flotation devices such as life jackets at the time of the accident.

According to a report by The Colorado sun, Searchers said the raft overturned in whitewater flowing at about 3,200 cubic feet per second, a medium to fast speed on the Colorado River.

The Colorado Sun also reported that this is not the first fatality of Colorado’s rafting season this year. Just last week, on May 30, the Larimer County Sheriff’s Office reported that a woman died after her raft struck a bridge abutment near the Greyrock Trailhead, more than 100 miles from Yarmony Rapid.

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According to the Colorado Parks and Wildlife (CPW) website, all whitewater rafters, kayakers, or canoeers should always wear a properly fitting life jacket, wear a helmet in Class IV or higher whitewater areas, and “be aware of your own limits and those of your group and equipment.”

“Never forget the power of the river and know the stretch of river you are boating on,” advises the CPW.

BLM River Rangers will continue the search for the missing man on Sunday, the sheriff’s office said.

“Anyone rafting in the area is asked to be alert and call or text 911 with any additional information or sightings,” the sheriff’s office added.