BANGKOK, JAN 8: Thai narcotics suppression agencies seized 100 kg (220 pounds) of heroin and more than four million tablets of methaphetamines in two Thai fishing boats in the Andaman Sea, the Thai Navy said on Monday.The Navy said in a statement four Thais and 22 Myanmar sailors were arrested in the boats on Sunday while sailing near the Surin group of islands along the Thai-Myanmar maritime border.No other details of the arrest were given, but the agencies would hold a news conference later on Monday after the boats arrived at a naval base, the statement said.Thailand, once notorious for being the largest supplier of heroin to the world, now faces a serious problem with methaphetamine, known in its crystaline form as "Ice".The government has said the methaphetamine problem is so serious that it threatens National security.