Authorities told local media that the landowners did not have a license to run a campground. At least seven people were hospitalised and dozens more were rescued unharmed, said district police chief Suffian Abdullah.

Leong Jim Meng told the New Straits Times English-language daily that he and his family were awakened by a loud bang and felt the earth move at the campsite in Batang Kali, around 50 kilometres north of the capital of Kuala Lumpur.

“My family and I were trapped as soil covered our tent. We managed to escape to a carpark area and heard a second landslide happening,” the 57-year-old was quoted as saying. He said it was surprising because there was no heavy rain in recent days, only light drizzles.

It is currently the season for monsoon rains in Malaysia, and the country's government development minister, Nga Kor Ming, said all campsites nationwide that are near rivers, waterfalls and hillsides would be closed for a week to assess their safety.

The Selangor state fire department posted photos of rescuers digging through soil and rubble with an excavator and shovels. Officials said the rubble is believed to be eight metres deep. More than 400 rescuers as well as tracking dogs are set to work through the night to find the dozen people still missing.

Selangor state fire chief Norazam Khamis was cited by the Free Malaysia Today news portal as saying that two of the bodies found were “hugging each other” and believed to be mother and daughter. The fire department said five children were among those who perished.

An estimated 450,000 cubic meters of debris — enough to fill 180 Olympic-sized swimming pools — hit the campsite, Nik Nazmi Nik Ahmad, the natural resources, environment and climate change minister, told local media.

Suffian, the district police chief, said the victims entered the area, a popular recreational site for locals to pitch or rent tents from the farm, on Wednesday. The campsite is not far from the Genting Highlands hill resort, a popular tourist destination with theme parks and Malaysia’s only casino.

After visiting the site late Friday, Prime Minister Anwar Ibrahim announced a special payment to the families of those killed as well as survivors.

Nga told local media that the campsite has been operating illegally for the past two years. The operator has government approval to run an organic farm but has no license for camping activities, he said. If found guilty, Nga warned, the camp operator could face up to three years in prison and a fine.