A magnitude 6.4 earthquake struck the island of Lombok in Indonesia, the US Geological Survey said.
The quake, which struck at 6.47am local time on Sunday, was followed less than an hour later by a 5.4 magnitude aftershock in the same area.
The epicentre was 80 miles northeast of the islands main city of Mataram and was very shallow, which would have amplified its effect.
The earthquake was on land and did not trigger any waves or tsunami but authorities issued a yellow alert, suggesting there was a possibility of casualties.
A 6.4 magnitude is strong enough to cause injuries and damage to buildings, but largely depends on how densely populated the affected area is.
