P111 CEEFAX 111 Sat 13 Feb 22:31/59       Police in Thailand have made what is believed to be the world's biggest seizure of heroin. They found nearly one and a quartet tons of the drug hidden in baler of rubber sheets in the docklands area of Bangkok. The haul was bound for New York, where it would have had an estimated street value of one to two billion dollars. Police are looking for the manager of the export company shipping the bales. He disappeared from his office and home immediately after the heroin was found. News index 102/202 Newsreel 119/219