The devastating earthquake and tsunami which struck the Indonesian island of Sulawesi have left at least 832 people dead, according to the latest figures announced by the national disaster mitigation agency on Sunday.

The death toll from the disaster has almost doubled since Saturday (over 420 killed were announced at that time). The natural disasters also affected areas much larger than initially estimated, the latest official updates say. The spokesman of the agency, Sutopo Purwo Nugroho, said that 540 injured people were sent to local hospitals.

Korban gempa dan tsunami di Kota Palu terus bertambah. RS Bhayangkara Palu saat ini jumlah 261, dan masih terus bertambah. Kemarin sudah diidentifikasi 87 jenazah oleh Tim DVI Polri. Proses identifikasi terus dilaksanakan. pic.twitter.com/Z1WhbL3A6f — Sutopo Purwo Nugroho (@Sutopo_PN) September 30, 2018

Earlier, Vice President Jusuf Kalla voiced fears that the death toll may go into the thousands, local media reported.

READ MORE: Hero air traffic controller dies helping last plane escape Indonesian earthquake and tsunami

The rescue operation is complicated as the severely damaged roads impede deployment of heavy equipment to search for victims under the rubble, the head of the National Disaster Management Agency (BNPB), Willem Rampangilei, told journalists on Saturday. He also said that “10,000 refugees are scattered in 50 points in Palu city.”

Evakuasi korban tertimbun gempa di Hotel Roa-Roa Kota Pqluterus dilakukan Tim SAR Gabungan dikoordinir Basarnas. Diperkiran terdapat 50 orang di bawah reruntuhan bangunan. Alat berat diperlukan untuk evakuasi. pic.twitter.com/LGWwp3OEhE — Sutopo Purwo Nugroho (@Sutopo_PN) September 30, 2018

The powerful quake hit the island on Friday, triggering tsunami waves as high as six meters (20 feet), and wreaking havoc across the communities. Many people were feared to be trapped in the rubble of collapsed buildings.

Among the victims was a 21-year-old Indonesian air traffic controller, Anthonius Gunawan Agung, who stayed on duty at Mutiara Sis Al Jufri Airport in Palu as the earthquake shook the site. The hero wanted to make sure one last aircraft escaped the disaster, but did not manage to save himself and died from his injuries after attempting to flee the trembling building.

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