Palu, Indonesia CNN —  

Mass graves were dug Monday as Indonesian authorities rushed to bury hundreds of people killed by an earthquake and tsunami that cracked streets, tore down buildings and washed away homes on the island of Sulawesi.

Three days after the disaster, the streets of the provincial capital Palu were still covered in debris and bodies thrown about by a magnitude 7.5 earthquake that triggered tsunami waves up to three-meters-high (10 feet).

Authorities raised the toll again Monday to 844 dead, and warned that more bodies were likely to be found as heavy equipment moved in to clear the rubble.

Conditions in the devastated area are grim, with food and water supplies running low and few buildings sturdy enough to offer safety from any aftershocks.

Body bags lie in an open ditch in Palu, Indonesia.
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