The cubs who were at the base of the mountain in 2013 died on May 16, and the U.S. Fish and Wildlife Service announced the deaths on Thursday.
The agency said the cub had died of hypothermia.
The agency said a female cub died after a short time on the ground.
It’s not clear how the cub died, but a male cub died on April 19 after he was struck by lightning while attempting to climb up the mountain.
It’s unclear how many cubs were on the mountain at the time of the deaths, though the U,S.
Forest Service said it had “heard from numerous sources” that more than a dozen cubs died.
The cubs and their parents were found in a cave and the cub was found alive by the American Red Cross, according to the agency.
It said the family was in “extreme distress” at the mountain and it was working with a rescue team.
It said it will be working with the family to determine how the male cub survived the ordeal.