Nirmal Purja is feared missing after an avalanche struck Broad Peak in Pakistan, leaving a 10-person international team out of communication and prompting an ongoing search and rescue operation.The Alpine Club of Pakistan reported the avalanche hit around midday on the 8,047-meter Karakoram peak; the group includes climbers from Pakistan, the US, China, Oman and Nepal.Government authorities and local rescuers are coordinating ground efforts and hope to deploy helicopters if weather allows while teams contend with high winds, unstable snow and the hazards of high-altitude operations.