Grand Canyon officials say a California man who was reported missing from a river trip at the national park is presumed to have drowned.
Park emergency services officials say 66-year-old Peter Francis Schwab hasn't been seen since June 28 and he is believed to have drowned in the Colorado River.
The missing-person investigation is ongoing. Schwab was reported missing after a day hike.
He was last seen on a beach downriver from National Canyon.
Anyone with information about Schwab is encouraged to contact the National Park Service.