KATHMANDU: An Indian climber has gone out of contact on Mt Everest since yesterday, according to the expedition organiser.

Chhewang Sherpa, Managing Director at Arun Treks, said that Ravi Kumar, a climber from Moradabad of Uttar Pradesh, India, has gone out of contact from the balcony area after he was descending to lower camps after successfully standing atop the world's highest peak at 1:28 pm on Saturday.

According to him, his climbing guide Lakpa Wongya Sherpa has also been found unconscious after suffering from frostbite at Camp IV.  Ravi Kumar and the climbing guide got separated during the descent, he added. “Efforts are underway to conduct a search for the missing climber.”