An avalanche on Monday hit an Indian patrol in the world’s highest militarised zone in the Himalayas, killing four soldiers and two porters, an army spokesman said. The disaster was the latest on the Siachen Glacier at more than 5,000 metres (16,500 feet) that is claimed by India and rival Pakistan. Hundreds of troops from both sides have died in avalanches and from the fierce climate in the region over the past three decades.