The death toll from floods on Indonesia’s Sulawesi island has risen to at least 21, authorities said Wednesday as residents tried to salvage a few belongings from their inundated homes.

The flash floods in North Luwu regency left hundreds of houses buried in mud after three rivers burst their banks due to torrential rains which started on Monday.

Nearly 1 600 people were taking refuge in temporary shelters. The death toll rose to 21 with the discovery of six more bodies including a child but authorities said it was not clear how many people were still missing. Dozens thought to have been swept away had been located but at least two remained unaccounted for.