GRAND CANYON NATIONAL PARK, Ariz. — Authorities at Grand Canyon National Park say the search continues for missing guide from a commercial trip on the Colorado River.

They say 34-year-old Joshua Tourjee of Moab, Utah was reported missing Monday.

The National Park Service received a satellite phone call from members of the river trip saying Tourjee failed to return to camp Sunday evening near Pancho’s Kitchen.

On Tuesday, crews searched on the water from Pancho’s Kitchen to Matkat.

Two ground crews are scheduled to search Wednesday with an additional boat launching from Lees Ferry to help out.

Tourjee is working as a guide for OARS.

Authorities say he was last seen wearing a lime colored, short-sleeved shirt and dark colored shorts with an inflatable pool raft, possibly in the shape of a black swan.