The death toll from a magnitude 6.9 earthquake that hit the Indonesian island of Lombok on Sunday, has risen to 259, according to the officials.
On Thursday, the region has been struck by more than 350 aftershocks.
Rescue workers are still digging through the wreckage and trying to get aid to survivors of the earlier, larger earthquake.
Officials said of the latest death toll: "This number will continue increasing as rescue teams continue to find victims under collapsed buildings."
Indonesia's chief security minister said that 319 people had died, while local media have reported figures as high as 347.
The Red Cross said that Sunday's incident was "exceptionally destructive".
Some villages had "completely collapsed", said a Red Cross official in Lombok, Christopher Rassi.