Three people have been killed and 45 hurt after two powerful earthquakes shook the island of Sumbawa in eastern Indonesia, officials say.
Most of the injured were hit by collapsing walls, officials said.
The quakes, of magnitude 6.4 and 5.0, hit within hours of each other.
Hundreds of buildings on the island were damaged or destroyed. Witnesses said many residents had fled their homes and were unwilling to return.
The island of Sumatra, on the other end of the archipelago, was also hit by a powerful earthquake.
The country lies on the so-called Pacific Ring of Fire, one of the most seismically active regions of the world.
"People screamed and ran out of their houses," a local resident named as Adit told a local radio station.
"They're staying outside on the street and some prefer to stay at the soccer field - nobody is in their house."
Agung Prasetyo, a local police officer, said the ground shook violently for about 30 seconds during the second tremor.
"Everyone panicked, they were running from their houses, some to the hills," he told the Associated Press news agency.
Health official Rustam Pakaya said a child was among the dead, and the latest reports showed more than 500 buildings had been either destroyed or damaged.
Most of the injured were said to have been hit by collapsing walls.
The tremors caused a power cut, forcing a hospital to be evacuated briefly.
Indonesia was the nation worst hit by the Asian tsunami in December 2004, which killed 168,000 people in Aceh province alone.