A person has died and several others were injured when a motorboat flipped on rapids in the Grand Canyon on Saturday, officials say.
The boat flipped just after 2pm at Bedrock Rapid on the Colorado River, the Grand Canyon National Park Service said in a statement.
They launched a search and rescue operation to treat transport the injured to hospital.
It was unclear how many were injured in the incident.
John Dillon, the executive director of the Grand Canyon River Outfitters Association, told the Associated Press that the boat flipped on a technical rapid when it came up against a rock.
Mr Dillon said some passengers decided against continuing the trip, which was operated by Western River Expeditions.
Bedrock Rapid is described as a large rock island in the middle of the river that splits the river into a left and right channel by the Go Rafting website.
