Indonesian rescuers have recovered 20 bodies and are looking for two villagers who remain missing after flash floods on Sumatra island caused mud and rocks to tumble down mountainsides, officials said Tuesday.

The torrential rains that poured down over the weekend flooded four districts of North Sumatra Province, destroying houses and farms.

In a Tuesday statement, Abdul Muhari, spokesperson for the National Disaster Management Agency said that four more bodies had been recovered in Karo Regency on Monday evening. This brings the total to 10.

Rescue workers are still looking for two people who have been swept away by flash floods in Deli Serdang.

Rescuers had recovered two bodies earlier in South Tapanuli District, and four family members, including two small children, from Harang Julu village, located in Padang Lawas.

Indonesia is an archipelago consisting of over 17,000 islands, where millions of people reside in mountainous regions or near fertile floodplains.