The Department of Foreign Affairs's hotline for Australians wishing to check on friends and relatives in affected areas of Thailand, Sri Lanka, India, Maldives and Indonesia is 1800 002 214. Australia is preparing emergency aid for the Asian nations struck by the tsunamis. The Federal Government has already committed $10 million to the relief effort and will review that figure as more information about the devastation unfolds. Foreign Affairs Minister Alexander Downer says he has received reports of six Australians missing in the region but there are no reports of any deaths.A 16-year-old Melbourne boy with Downs Syndrome and a middle-aged Australian man are missing in Thailand. The teenager was separated from his parents when the largest wave overwhelmed a crowded stretch of Phuket's main Patong Beach, where officials say more than 100 people died. He says about 18,000 people have called a special hotline, worried about friends and relatives in the affected area. Mr Downer says the Government is particularly worried about the welfare of Australians in Sri Lanka. Extra consular staff have been sent to the capital, Colombo, to try to determine the welfare of those people. "It's just the nature of first of all the tsunami and secondly the topography there," he said. "There are believed to have been Australians holidaying along the south and south-east coasts of Sri Lanka, particularly around a place called Galle. "Now we don't have much information at this stage but we're trying to establish the welfare of those people."