Seasonal rains often cause flooding and landslides in Indonesia, which is comprised of a chain of 17,000 islands where millions of people live in mountainous areas or flood-prone plains close to rivers.
At least 17 people are feared to have been buried during a landslide in a village in Indonesia's East Java province, according to country's National Disaster Management Authority (BNPB).
"Signs of possible landslides were actually felt by villagers for the past 20 days, with some cracks seen on the rocky hill in the village", Sutopo said.
Around 30 houses were also hit by the disaster.
The local mitigation agency said 27 people were buried, while a local army chief put the number of missing at 38.
A rescue operation involving soldiers, police and volunteers was under way.
Seasonal rains cause frequent floods in Indonesia, the world's largest archipelago nation, where numerous country's 256 million people live in mountainous areas or fertile, flood-prone plains near to rivers.
Numerous country's 256 million people live in mountainous areas or fertile, flood-prone plains near rivers.