of minimum 1 year would be needed to rebuild and repair the damaged schools in the affected areas. In the immediate aftermath of the earthquake, prisoners in the Donggala Penitentiary in Central Sulawesi rioted and set the prison on fire as they demanded to be met by their families. At least 100 prisoners managed to escape. The prison reportedly suffered severe damage. Minister of Agriculture Amran Sulaiman stated that the earthquake, tsunami and subsequent soil liquefaction damaged 9,718 hectares of crops throughout Palu, Sigi and Donggala, costing 36 billion rupiah in damage. Overall damage cost from combination of earthquake, tsunami and liquefaction is Rp 18 Trillion Mudflows Parts of Central Sulawesi had been hit by major mudflows following the earthquake as a result of liquefaction. The most affected areas were the Petobo sub-district in southern Palu and the village of Balaroa, just outside the city, both locations some distance from the coast. In Petobo, at least 34 Indonesian students from a Bible camp were killed, but it is suspected that many others are dead. Most of the district's 744 houses had been destroyed and 200 bodies were retrieved. Survivors of the mudflow in Petobo stated that as soon as the earthquake struck, 2-meter-high mud came out from the ground. Survivors also recalled that the ground immediately turned into liquid-like substance. Hundreds of houses sank into the soil and hundreds of people were drowned by the mudflow. Out of the 13,000 inhabitants in Petobo, 6,000 are thought to have been buried by the mud. Indonesian National Board for Disaster Management announced that 2,050 houses were destroyed by the mudflow in Petobo and an area of 180 hectares were shifted by the liquefaction. Balaroa almost disappeared as the ground collapsed, with most of the village's 1,747 houses sinking into the mud. Of the 2,000 inhabitants, 600 are known to have died, while more than a thousand are still missing. The liquefaction reportedly shifted an area of 47.8 hectares. Several places were shifted to the north while several others were shifted to the west and southwest. Major soil liquefaction was reported in Sigi Regency, which was located south of Palu. Numerous eyewitnesses stated that the total amount of liquid released by the soil was so immense that buildings and structures were swept away. There were also reports that a whole village was gone. The liquefaction shifted an area of 202 hectares. The major