At Poboya - in the hills above the devastated seaside city of Palu - volunteers began to fill a vast grave with the dead, with instructions to prepare for 1,300 victims to be laid to rest.

Authorities are desperate to stave off any disease outbreak caused by decomposing bodies, some now are riddled with maggots.

Three trucks arrived stacked with corpses wrapped in orange, yellow and black bags, an AFP reporter on the scene saw. One-by-one they were dragged into the grave as excavators poured soil on top.