There is no chance of finding more than 150 people who are believed to have been buried by a massive landslide in northern Nepal, an official said on Sunday, as rescuers struggled to dig through piles of rock, mud and trees.

Rescuers have so far recovered only eight bodies since the landslide early Saturday blocked a mountain river, the Sunkoshi, causing the water to form a lake that threatenend to burst and sweep several villages. Fresh rainfall on Sunday hampered search attempts.

"We have no chance of finding any of the missing people alive under this pile of debris," said Yadav Prasad Koirala, who heads the government's Department of Natural Disaster Management. "We have names of 159 people who are believed to be missing and buried but there could be even more people."

Koirala said it was even difficult for bulldozers and heavy equipment to move the debris that had crushed dozens of houses in the village of Mankha, about 120 kilometres east of Kathmandu, Nepal's capital.

Gopal Parajuli, the chief government administrator in the area, said the water level and mud were making rescue work very difficult, and that army troops used explosives to try to relieve the dangerous build-up of water.

The controlled explosions knocked down part of an earth wall that had created a temporary damn blocking a river, which allowed some water to flow out. But much of the water still remained trapped, posing an immediate threat of flash floods to downstream villages as far away as India, Parajuli said.

A Mankha resident who was among the dozens of people injured by the landslide said he feared his entire village had been wiped out.

"There are nearly 100 people in the 60 houses in my village and 20 more people in the neighbouring village who were buried by the landslide. All of them are likely dead," Durga Lal Shrestha said on Saturday from his hospital bed in Kathmandu, where he was flown by helicopter.

Shrestha, who suffered bruises on his face and arms, said he and his family heard a rumbling sound and the ground shook like an earthquake.

"The walls in my house caved in, but the roof was fine and that is how we were able to survive," he said. "When we came out, it was dark and muddy. Everyone was screaming and it was a chaotic situation."

About 40 people were injured. Besides Shrestha, 10 others were flown to Kathmandu for hospital treatment, including a Belgian man.

The Arniko highway, which connects Nepal to Tibet, remained closed on Sunday.

In neighbouring India's Bihar state, authorities evacuated thousands of villagers after flood warnings were issued in eight districts at risk of flash floods. Indian army soldiers and air force helicopters and jets were readied to launch relief and rescue operations, said Anirudh Prasad, a top official in Patna, Bihar's capital.

Landslides are common in mostly mountainous Nepal during the rainy season, which runs from June to September.

A landslide in May 2012 killed at least 26 people when an avalanche blocked the Seti river in northwestern Nepal. The walls burst, causing a flash flood that swept several downstream villages.

(Aljazeera)