Three climbers feared dead on New Zealand's tallest mountain

BBC News 

Helicopters and drones have been used to try and trace the location of the three climbers, who set out to climb Mt Cook on Saturday. Ms Walker said drone footage showed evidence of where the climbers had begun to cross the slopes below the Zurbriggen Ridge. This included footprints and equipment, including clothes and energy gels, which are thought to have belonged to the men. Scaling Mt Cook via the Zurbriggen Ridge is a Grade Four climb, according to New Zealand alpine group Climb NZ. This mean that it requires "sound mountaineering judgement and experience". Both Blair and Romero are said to have been experienced climbers.