ISLAMABAD, Pakistan — Pakistani military helicopter teams rescued six mountain climbers on Tuesday after an avalanche trapped them on a treacherous stretch of the Hindu Kush on the border with Afghanistan, officials said.

The rescued climbers — four of them Italian, two of them Pakistani — were hit on Monday near the summit of the 5,800-meter Lions Melvin Jones Peak. Their Pakistani guide was killed immediately, officials said, and the survivors sustained minor injuries.

“They have been rescued and are under treatment at the Combined Military Hospital in Gilgit,” Naiknam Karim, the chief executive of Adventure Tours of Pakistan, said in a telephone interview from Gilgit, in northern Pakistan. “The Pakistani climbers can walk, while the Italian have minor injuries.”

Officials said it had taken two helicopters roughly four hours to bring the climbers down.

Mr. Karim, whose company provided ground services for the climbers, said that the team, known as the Pakistan-Italian Friendship Expedition, had set out from base camp on June 5. It was the second time they had attempted the climb, which is in the Ishkoman Valley.