Mudslide engulfs Indian Himalayan town

A flash flood driving a torrent of mud smashed into a town in India's Himalayan region on Tuesday, killing at least four people with around 100 others missing.

The roaring waters tore down a narrow mountain valley, demolishing buildings as the flood barrelled into the town of Dharali in Uttarakhand state.

"It is a serious situation," Minister of State for Defence Sanjay Seth told the Press Trust of India (PTI) news agency.

"We have received information about four deaths and around 100 people missing. We pray for their safety."

Videos broadcast on Indian media showed a terrifying surge of muddy water sweeping away multi-storey apartment blocks in the tourist region.

Several people could be seen running before being engulfed by the dark waves of debris that uprooted entire buildings.

Uttarakhand State Chief Minister Pushkar Singh Dhami said rescue teams had been deployed "on a war footing".

India's army said 150 troops had reached the town, helping rescue around 20 people who had survived the wall of freezing sludge.

"A massive mudslide struck Dharali... triggering a sudden flow of debris and water through the settlement," the army said. Images released by the army, taken from the site after the main torrent had passed, showed a river of slow-moving mud.

A wide swath of the town was swamped by deep debris. In places, the mud lapped at the rooftops of houses.

State Disaster Response Force commander Arpan Yaduvanshi said the mud was 50 feet (15 metres) deep in places, swamping some buildings entirely.

"Search and rescue efforts are ongoing, with all available resources being deployed to locate and evacuate any remaining stranded persons," army spokesman Suneel Bartwal said.

Prime Minister Narendra Modi expressed his condolences in a statement, and said that "no stone is being left unturned in providing assistance".

Chief Minister Dhami said the flood was caused by a sudden and intense "cloudburst", calling the destruction "extremely sad and distressing".