 The fires originated mostly in Kalimantan, the Indonesian part of Borneo, and on Sumatra, where they are set by swidden agriculturists employed by agroforestry concerns to clear land to grow pulp woods or market crops ahead of the growing season.Satellite images taken over Borneo on 4 October showing 561 "hot spots" areas where fires had been set.Officials in neighbouring countries accused Indonesian officials of doing nothing to stop the fires, though forestry ministry officials said they had firefighters working to douse the blazes on state-controlled land.