Updated

Authorities said they have found a body in Grand Canyon National Park and believe it's that of a Northern Arizona University student missing on a hiking trip.

Search and rescue crews have been looking for 20-year-old Bryce Gillies since Tuesday.

Park officials said a body — presumptively identified as Gillies — was found Saturday morning less than half a mile from the confluence of Bonita Creek and the Colorado River on the North Rim, along with a backpack and personal items.

They said the Coconino County Medical Examiner's Office will try to identify the body and determine the cause of death.

Search crews found Gillies' car Wednesday.

Gillies started his hike July 18 with plans to come home Monday, authorities said.

Gillies' father called park officials Tuesday when his son failed to return.