Three Russian climbers have reportedly lost contact with the base camp since Sunday while descending from Mt Annapurna.

A report in The Himalayan Times, citing sources at the base camp, said the three climbers -- Sergey Kondrashkin, Alexander Luthokin, and Dmitry Sinev -- who attempted to climb the world's tenth highest peak in an alpine style, went out of contact as they were retiring from Camp IV. 

Two among them had successfully made the ascent while one, Alexander Luthokin, aborted his attempt mid-way from above 7,000m. The report claimed that Seven Summit Treks (SST)-- which provided base camp services to the climbers--has sent a team of rescuers to locate them this morning.

They might have faced trouble in the high camps as some sign of movement was traced last night between camps III and IV. SST is also preparing to helidrop help with food and water supplies.

Sherpas were sent to high camps for more details regarding the situation. At least 68 climbers including six Nepali women had scaled the 8091m high peak on Friday, the report says.