A 71-year-old boater’s body was recovered from Grand Canyon National Park, marking the 16th fatality of the year. The National Park Service is investigating.

Grand Canyon National Park has reported its 16th fatality of the year with the recovery of a 71-year-old boater’s body on Tuesday.

The individual, who was on a private boat trip, went missing after others in the group noticed his absence. The missing man was last seen around Lower Nankoweap Camp, located approximately 53 miles (85 kilometers) from the trip’s starting point.

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The group contacted the park’s communications centre late on Monday to report his disappearance, noting that he had left behind his hat and water bottle.

Park rangers deployed a helicopter to search for the missing boater, eventually locating the body about 10 miles (16 kilometers) downstream.

The National Park Service and Coconino County medical examiner’s office are investigating the circumstances surrounding this death, as well as the recent passing of a 59-year-old Colorado man who was found dead on a Colorado River rafting trip over the weekend.