PALU, Indonesia — Indonesian authorities scrambled on Monday to get help into quake-hit Sulawesi island as survivors streamed away from their ruined homes and accounts of devastation filtered out of remote areas, including the death of 34 children at a Christian camp.

The confirmed death toll of 844 was certain to rise as rescuers reached devastated outlying communities hit on Friday by a 7.5 magnitude earthquake and subsequent tsunami waves as high as six meters (20 feet).

Dozens of people were reported to be trapped in the rubble of several hotels and a mall in the small city of Palu, 1,500 km northeast of Jakarta. Hundreds more were feared buried in landslides that engulfed villages.

Of particular concern is Donggala, a region of 300,000 people north of Palu and close to the epicenter of the quake, and two other districts, where communication had been cut off.

The four districts have a combined population of about 1.4 million.

President Joko Widodo told reporters getting those people out was a priority.

“The evacuation is not finished yet. There are many places where the evacuation couldn’t be done because of the absence of heavy equipment, but last night equipment started to arrive,” Widodo said.

“We’ll send as much food supplies as possible today with Hercules planes, directly from Jakarta,” he said, referring to C-130 military transport aircraft.

The disaster agency said later more heavy equipment and personnel were needed to recover bodies.

One woman was recovered alive from ruins overnight in the Palu neighborhood of Balaroa, where about 1,700 houses were swallowed up when the earthquake caused soil to liquefy, the national rescue agency said.

“We don’t know how many victims could be buried there, it’s estimated hundreds,” said Sutopo Purwo Nugroho, spokesman for the National Disaster Mitigation Agency.

All but 23 of the confirmed deaths were in Palu, a city of about 380,000 people, where workers were preparing a mass grave to bury the dead as soon as they were identified.

However, nearly three days after the quake, the extent of the disaster was not known with authorities bracing for the toll to climb — perhaps into the thousands — as connections with remote areas up and down the coast are restored.

Aid worker Lian Gogali, who had reached Donggala district by motorcycle, said hundreds of people facing a lack of food and medicine were trying to get out, but evacuation teams had yet to arrive and roads were blocked.

“It’s devastating,” she told Reuters by text.

Indonesian Red Cross spokeswoman Aulia Arriani said a church in an area of Sigi district, south of Palu, had been engulfed in mud and debris. Officials said the area suffered liquefaction, when the shock of the quake temporarily destabilizes the soil.

“My volunteers found 34 bodies ... children who had been doing a bible camp,” Arriani said.

Sulawesi is one of the earthquake-prone archipelago nation’s five main islands and sits astride fault lines. Numerous aftershocks have rattled the region.

Pictures showed expanses of splintered wood, washed-up cars and trees mashed together, with rooftops and roads split asunder. Access to many areas is being hampered by damaged roads, landslides and collapsed bridges.

A Reuters witness said queues at petrol stations on the approaches to Palu stretched for kilometers. Convoys carrying food, water and fuel awaited police escorts to prevent pilfering before heading towards the city while residents streamed out.

One aid worker spoke of threats of violence among survivors seeking fuel.

The state energy company said it was airlifting in 4,000 liters of fuel, while Indonesia’s logistics agency said it would send hundreds of tons of rice. The government has allocated 560 billion rupiah ($37.58 million) for the recovery. — Reuters