Indo-Tibetan border police, who released the footage, said in a statement the cause of the avalanche remained a mystery, however they believed the eight climbers' combined weight might have been the trigger.
GoPro footage from the Himalayan expedition where eight climbers including an Australian woman were killed in an avalanche late in May has been released by Indian authorities. Seven of the bodies were recovered on June 23.
The clip posted To Twitter runs to nearly two minutes and was found on a GoPro camera discovered in the snow at an elevation of 19,000 feet near where the bodies were found in June.
'Suddenly we noticed a loud noise.
Then the screen goes blank. The peaks and ranges of the Himalayas are very attractive and trekkers and mountaineers like them a lot.
ITBP officials say the sound could be of an avalanche or snow storm that claimed the lives of eight climbers.More news: Spanish court rules Julio Iglesias is father of 43-year old man
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According to ITBP Deputy Inspector General A P S Nimbadia, the 1.55-minutevideowas sourced from a memory card retrieved from near the bodies. They took great care in removing them and bringing them down the mountain, preserving them in the snow overnight to stave off decomposition.
Contact with the group was initially lost on May 26, as the prelude to an air search being launched after the group failed to respond on May 31.
"The GoPro has proved to be like the black box of an aircraft giving an insight into the last few moments of the climbers", added Nambadia, who said the search for the bodies at a 20,000-foot altitude was "extremely challenging".
The clip is now being used to help "analyse what went wrong with their mission".
In this very hard search operation in high Himalayas, the ITBP team retrieved seven dead bodies on 23/06/2019.
'They were emotionally charged when they found the baby penguin.
Nanda Devi is the second-highest mountain in India, part of the Garhwal Himalayas in Uttarakhand state.