An aerial search for three experienced climbers who lost contact with base camp during their ascent of the world’s second highest mountain, K2 will resume on Monday, officials said.

Karrar Haideri, from the Alpine Club of Pakistan said army helicopters had earlier resumed the search which began a day earlier for Pakistani mountaineer Ali Sadpara and his two companions, John Snorri, from Iceland, and Juan Pablo Mohr, from Chile.

The men lost contact with base camp late on Friday and were reported missing on Saturday after their support team stopped receiving reports from them during their ascent of the 28,250ft (8,611m) mountain in northern Pakistan.

“The base camp received no signals from Sadpara and his foreign companions after 8,000m … A search is on and let’s pray for their safe return home,” Mr Haideri told the Associated Press.

On Saturday, helicopters flew to a height of 23,000ft (7,000m) to try to locate the missing mountaineers with no success.

Pakistan’s foreign ministry issued a statement saying Iceland’s foreign minister, Gudlaugur Thor Thordarson, spoke to his Pakistani counterpart, Shah Mahmood Qureshi, by telephone.

Mr Qureshi assured him that Pakistan will spare no effort in the search for the missing trio.

Mr Sadpara and his team left their base camp on February 3, a month after their first attempt to scale the mountain failed because of weather conditions.

Mr Haideri said Mr Sadpara’s son, Sajid, had returned to the base camp safely after his oxygen regulator malfunctioned at 26,247ft (8,000m).

Mr Haideri said Mr Sadpara is an experienced mountaineer who has climbed the world’s eight highest peaks, including the highest, Mount Everest, and was attempting to climb K2 in winter.

K2, located in the Karakorum mountain range, is one of the most dangerous climbs.

Although Mount Everest is 777ft (237m) taller than K2, the latter is much further north on the border with China and subject to worse weather conditions, according to mountaineering experts.

They say a winter climb is particularly dangerous because of the unpredictable and rapid change in weather conditions.

Winter winds on K2 can blow at more than 125mph (200kph) and temperatures drop to minus 60C (minus 76F).

A team of 10 Nepalese climbers made history on January 16 by scaling K2 for the first time in winter.