'The flood took everything': Nepal survivors describe horror of loved ones being swept away

Survivors of massive flash floods in Nepal have recounted how they saw their loved ones disappear into torrents of mud.

More than 175 people have died and 800 others are missing after floods wiped out entire villages on the border of Nepal and Tibet on Wednesday, with a force so powerful seismologists initially identified it as an earthquake.

Rescuers trudged through thick mud and debris on Thursday as Nepalese authorities rushed to bring aid and relief supplies to the affected areas.

"My family members were swept away by the flood in front of my eyes," Kalpana Malla from Nepal's Nuwakot district told the BBC.

Malla said her father, mother, sister and sister's children were all claimed by the disaster.

"They could not escape the flood; there was no chance at all," she said. "This flood took everything, but my son and I climbed the rooftop of a house and survived but couldn't explain how."

Her son, Sugam Malla, said he saved his mother by pulling her hand.

He said he had given his phone to his sister so she could keep in touch, but the mobile was no longer reachable.