The death toll in Indonesia's powerful earthquake and an ensuing tsunami in Sulawesi Island jumped to 1,571 on Friday while search and rescue for the victims was extended, officials said.

During a press conference, National Agency for Disaster Management spokesperson Sutopo Purwo Nugroho said that the number of injured people rose to 2,549 and more than 70,000 were displaced. A total of 1,551 people were buried in mass graves, Efe news reported. Rescue workers were working against the clock to find any remaining survivors, with humanitarian groups estimating that up to 1,000 people were buried under the rubble. Sutopo said that as many as 437 aftershocks occurred by Friday with the intensity weakening.