Rescuers are trying to reach four Italian mountain climbers and their Argentine guide after they became trapped by a storm at 22,000 feet, just below the summit of the highest peak in the Americas.

Italian consular official Giorgio Giacomello says the climbers have been stranded since Wednesday night on Mt. Aconcagua.

The Italian Foreign Ministry in Rome said Thursday that one of the Italians died, but Giacomello couldn't confirm the death.

Aconcagua is the loftiest mountain in the Western Hemisphere at 22,841 feet and a favorite summer challenge for experienced alpinists.