The powerful Nepal earthquake has triggered avalanches in the Mount Everest region, according to reports.
Alex Gavan, who describes himself as a mountaineer, said a "huge avalanche" had hit from Pumori, a mountain lying close to Mount Everest on the Nepal-Tibet border.
He claimed he was "running for life from my tent", and said there were "many, many" people up the mountain at the time.
At least one person is dead, and many more are feared trapped, after a nine-storey tower built in the 19th century collapsed in Kathmandu.
According to reports, one body was removed from the wreckage of the 183-year-old Dharahara, which came down following the 7.9-magnitude earthquake that hit Nepal's capital this morning.
Unconfirmed local reports suggest that a number of people could be trapped in the ruins.
The tower has been open to public for 10 years, and had a viewing balcony on its eighth floor.
Footage has emerged apparently showing the aftermath of a powerful earthquake in Nepal.
The video, which ITV News is attempting to verify, shows people desperately scrambling through the rubble of a large building in the capital Kathmandu.
Many of Kathmandu's historic places of worship have been destroyed in a 7.9 magnitude earthquake that hit Nepal this morning. Australian journalist Siobhan Heanue is on the ground, tweeting pictures of the devastation.
Two people have been reported dead so far in a 7.9 magnitude earthquake in Nepal.
One, a 15-year-old girl, died in India near the Nepalese border when a house wall fell down.
A child meanwhile also died in a town near Nepal's capital Kathmandu when a statue fell on her in a park.
Early reports suggest more people have been rushed to hospital.
Pictures taken in Kathmandu, Nepal show the extensive damage caused by a 7.9 magnitude earthquake.
80 per cent of buildings in Kathmandu are still standing, according to an eyewitness on the ground, but older buildings and temples seem to have been 'reduced to rubble'.
The first pictures from the aftermath of a huge earthquake measuring an estimated 7.9 on the Richter Scale have emerged, showing widespread destruction in Kathmandu, Nepal's capital
Seveal parts of India experienced tremors following an earthquake in Nepal, the Indian Prime Minister Narendra Modi has tweeted.
Mr Modi said his country would "reach out to those affected".
The magnitude of an earthquake that has struck in Nepal has been upgraded to 7.9, the US Geological Society say.