Kiwi pair missing on K2 A New Zealand father and son climbing duo are feared dead after they went missing on K2 in Pakistan. A NEW Zealand mountaineer and his son are feared dead after an avalanche reportedly destroyed their camp on the K2 mountain in Pakistan. Marty Schmidt, 53, and his son Denali, 25, are overdue climbing the world's second highest mountain. The International Herald Tribune website reports the pair went missing on Sunday afternoon as they attempted the 8611-metre peak. They had successfully reached Camp III at 7400m last week, even though other climbers had decided to turn back because of heavy snow. A Nepali sherpa reached Camp III, but said they were nowhere to be seen and the campsite tent showed signs of having been hit by an avalanche. The mountaineers' ice axes and crampons were found intact. British climber Adrian Hayes later posted on his Facebook page that the campsite had been wiped out. As Marty's last radio communication took place Friday night from the camp, the avalanche almost certainly occurred that night as they slept in their tent. It was a tragedy and the pair were the last people many would expect to be killed on a mountain, he said. However, a New Zealand Ministry of Foreign Affairs and Trade spokesman said officials were yet to confirm the pair had been killed. The Schmidts were known to be overdue, he said. Local Sherpas were dispatched to look for the missing climbers, but were unsuccessful. The local trekking company is now surveying the area where the climbers are thought to have gone missing," he said in a statement.