In this Oct 6, 2018 file photo, a villager stands amidst destruction caused by an earthquake and tsunami in Palu, Central Sulawesi, Indonesia. (TATAN SYUFLANA / AP)

JAKARTA, PALU, Indonesia — The confirmed death toll from the devastating earthquake and tsunami on Sulawesi island neared 2,000 on Monday, but thousands more remained unaccounted for and officials have said search teams planned to stop looking for victims later this week.

The official toll hit 1,948, mostly in the hard-hit city of Palu, said Jamaluddin, an official from the disaster task force who uses one name.

No one knows how many people are missing, especially in the areas hit by liquefaction, but it could be as high as 5,000, the national disaster agency said

But disaster agency spokesman Sutopo Purwo Nugroho said a day earlier that many victims could still be buried in deep mud in areas where the Sept 28 quake caused loose, wet soil to liquefy and swallow entire neighborhoods.

The announcement of the updated death toll came as children in Palu began returning to school on Monday to tidy up their classrooms and to help gather data on how many will be coming back.

The 7.5 magnitude quake brought down many buildings in the small city on Sulawesi island, 1,500 km northeast of Jakarta, while tsunami waves smashed into its beachfront. 

READ MORE: Indonesia says to end search for quake victims Thursday

But the biggest killer was probably soil liquefaction, which happens when a powerful quake turns the ground into a liquid mire and which obliterated several Palu neighborhoods. 

No one knows how many people are missing, especially in the areas hit by liquefaction, but it could be as high as 5,000, the national disaster agency said. 

At one state high school, teenagers dressed in grey and white uniforms swept up broken glass in the classrooms. Trophies had fallen from a broken school showcase and the basketball court was cracked. 

"It's sad to see our school like this," said Dewi Rahmawati, 17, who expects to graduate next year and wants to study economics at university. 

ALSO READ: Indonesian survivors desperate to flee disaster zone as toll climbs

In this Oct 6, 2018 file photo, a man carries a teddy bear and other items he recovered from his toppled house at the earthquake-hit Balaroa neighborhood in Palu, Central Sulawesi, Indonesia. (AARON FAVILA / AP)

The students found out that they had to turn up to school through messages on Facebook and WhatsApp. 

School principal Kasiludin said authorities told all teachers to show up for work from Monday to collect information on student numbers. 

"We won't force the students to come back because many are traumatized. But we must start again soon to keep their spirits up and so they don't fall behind," he said. 

The school had lost at least seven students and one teacher, he said. 

Across the city, nine schools were destroyed, 22 teachers were killed and 14 were missing, the disaster agency said, adding that 140 tents had been set up for classes. 

POSITIVE THINKING 

At the SMP Negeri 15 Palu middle school, fewer than 50 of its 697 students showed up. 

School principal Abdul Rashid said he was aware of four students killed in the quake. 

"Classes haven't started. We're only collecting data to find out how many students are safe," he said. 

"I'm still waiting for the Ministry of Education to give us instructions on when to begin classes. For now, I don't think we're ready. Many children are traumatized and frightened." 

ALSO READ: Aid trickling in as Indonesia death toll passes 1,400

One boy chatting in the school compound with friends said he was sad so few of his class mates had shown up. 

"I haven't heard from so many of them. I want to think positively; I hope they are OK," said Muhamad Islam Bintang Lima, dressed in the school uniform of white shirt and navy blue trousers. 

Most of the dead from the quake and tsunami were in Palu, the region's main urban center. Figures for more remote areas are trickling in but they seem to have suffered fewer deaths than the city. 

This Oct 4, 2018 file photo shows a boy injured during the tsunami being carried by his relative at a makeshift hospital in Palu, Central Sulawesi, Indonesia. (FAUZY CHANIAGO / AP)

Sulawesi is one of Indonesia's five main islands. The archipelago sees frequent earthquakes and occasional tsunamis. 

In 2004, a quake off Sumatra island triggered a tsunami across the Indian Ocean that killed 226,000 people in 13 countries, including more than 120,000 in Indonesia. 

A spokesman for the national disaster mitigation agency said on Sunday searches for bodies would stop on Thursday. 

Debris would be cleared and areas hit by liquefaction would be turned into parks and sports venues and will include memorials. 

Indonesia is hosting an International Monetary Fund/World Bank meeting on the island of Bali this week, which has drawn some criticism from the political opposition. 

"What is the benefit for us Indonesian people, especially in this time of catastrophe," Fadli Zon, deputy speaker of parliament from the opposition nationalist Gerindra party, said on Twitter, taking issue with government spending on the meeting. 

The government has allocated 560 billion rupiah (US$37 million) to help victims of the earthquake.