The highest mountain in New Zealand, Aoraki, is seen at Mount Cook National Park in the South Island, New Zealand, on Aug. 5, 2020. It lies amidst the Southern Alps mountain range. Sanka Vidanagama/NurPhoto via Getty Images

Three mountain climbers — two from the U.S. and one from Canada — missing for five days on Aoraki, New Zealand's tallest peak, are believed to have died in a fall, the authorities said Friday.

The men's bodies have not been found. But based on footprints glimpsed in the snow during an aerial survey, and items believed to belong to them retrieved from the slopes this week, the search for them has ended, Police Area Commander Inspector Vicki Walker told reporters.

The Americans — Kurt Blair, 56, from Colorado and Carlos Romero, 50, of California — were certified alpine guides, according to the website of the nonprofit American Mountain Guides Association. New Zealand authorities have not named the Canadian climber at the request of his family.

The men flew to a hut partway up the mountain on Saturday to begin their ascent and were reported missing on Monday when they did not arrive to meet their prearranged transport after the climb. Searchers hours later found several climbing-related items believed to belong to the men, but no sign of them, police said.

A search stalled for three days due to harsh weather conditions in the area. On Friday, drone operators spotted footprints in the snow and more items that authorities believe belong the the men.

"After reviewing the number of days the climbers have been missing, no communication, the items we have retrieved, and our reconnaissance today, we do not believe the men have survived," Walker said. "We believe they have taken a fall."

The search would resume if more evidence came to light, but the men's deaths have been referred to a coroner, Walker added.

According to CBS News Bay Area, Romero is a resident of Livermore, California, and worked as a guide for SWS Mountain Guides, based in Mount Shasta. He led multiple climbing expeditions to the Andes and is an accredited rock guide, alpine guide and ski guide.

"He was so gracious and sharing with younger guides, and sharing with all the guides to make them better guides and to make them safer guides," Timothy Keating, CEO of SWS Mountain Guides, told CBS News Bay Area Wednesday.

When asked about the climb, Keating said, "Never second guess any type of accident like this…You are never in the same situation, you can't second guess somebody's decisions or their moves."

Aoraki, also known as Mount Cook, is 3,724 meters (12,218 feet) high and is part of the Southern Alps, the scenic and icy mountain range that runs the length of New Zealand's South Island. A settlement of the same name at its base is a destination for domestic and foreign tourists.

The peak is popular among experienced climbers. Its terrain is technically difficult due to crevasses, avalanche risk, changeable weather and glacier movement.

More than 240 deaths have been recorded on the mountain and in the surrounding national park since the start of the 20th century.

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