Rescue workers are struggling to reach thousands of victims on northern Indonesian islands devastated by Monday's eight-point-seven-magnitude earthquake. The quake flattened buildings and destroyed crucial infrastructure, slowing the delivery of food and supplies to affected areas. Shortages of food, water and other supplies have been reported on hard-hit Nias island. There are also reports of looting by hungry survivors. Local aid workers say thousands of people need medical care. Australia, Japan and Singapore are sending military aircraft to Nias on Wednesday filled with relief supplies, equipment and personnel. Indonesian troops and nearby relief workers have already arrived on the island, to search for survivors and treat the injured. Officials estimate the death toll from the earthquake could reach 1,000, but so far several hundred bodies have been recovered.