LJUBLJANA, SLOVENIA: Authorities here on Tuesday said a Slovenian climber has died while trying to climb a 23,862-foot (7,273-meter) mountain in northern Pakistan and that a fellow climber called home with a mobile phone and is waiting to be rescued.

The Alpine Association and Foreign Ministry said that the pair began their ascent of Mustagh Tower on Monday, but one of them, Pavle Kozjak, fell into a chasm and died of injuries. They say that his colleague remains stranded at about 21,000 feet (6,400 meters), where he spent the night without any equipment or food.

He used a mobile to call his colleagues back home to seek help. The Foreign Ministry says the Pakistani rescue service has begun a search and that Slovenian climbers were en route to Pakistan to help.