A Grand Canyon hiker died over the weekend in Arizona while trying to walk rim to rim in one day, officials said Monday.

Ranjith Varma, 55, of Manassas, Virginia, was attempting to trek from the South to North Rim on Saturday afternoon when he became unresponsive along the North Kaibab Trail, approximately one mile south of Cottonwood Campground, the National Park Service said.

Rangers responded to the emergency call about the hiker in distress around 2 p.m. and deployed a helicopter with search and rescue personnel, the NPS said.

Bystanders performed CPR until the rangers arrived.

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North Kaibab Trail near Cottonwood Campground

Rescuers responded to the North Kaibab Trail near Cottonwood Campground after a hiker became unresponsive around 2 p.m. Saturday. (National Park Service)

The rescue helicopter had to perform "specialized" maneuvers to reach the hiker in the remote location, officials said. Rangers performed advance life support efforts but could not resuscitate the hiker.

Park officials warned that summer temperatures on exposed parts of the trail can reach over 120 degrees in the shade. Rangers strongly advised visitors to avoid hiking in the inner canyon between the hours of 10 a.m. and 4 p.m.

Grand Canyon Parashant National Monument

A view from the northern side of the Grand Canyon. (Getty Images/Bob Riha, Jr., File)

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"Be aware that efforts to assist hikers may be delayed during the summer months due to limited staff, the number of rescue calls, employee safety requirements, and limited helicopter flying capability during periods of extreme heat or inclement weather," park officials said.

Bright Angel Point Trail Grand Canyon

The Bright Angel Point trail in the North Rim of the Grand Canyon. Officials said Varma was attempting to hike from the South Rim to the North Rim in a single day on Saturday. (National Park Service, File)

NPS and the Coconino County Medical Examiner are investigating the death of Varma.

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No additional information was immediately available.