Maumere, Indonesia – Rescuers combed through debris for survivors Saturday after a powerful earthquake struck off Flores island in eastern Indonesia, killing at least 20 people and sending thousands fleeing.

As the full scale of the disaster unfolded, rescue official Fathur Rahman said at least 20 people were confirmed dead from four different towns on the island, popular with tourists.

“From the reports we have received, 20 people have died, six are injured, and two are still buried,” Fathur said by telephone from a boat on his way to Nagekeo regency, the hardest-hit area.