Col. Leonardo Gallego, head of the anti-narcotics division of the National Police, said his men had discovered three clandestine laboratories in a remote region of Cauca and Valle de Cauca provinces. It is Colombia`s biggest drug haul so far this year after police seized a record 54 tons (49 tonnes) of cocaine last year. Gallego said more than 60 police backed by helicopter gunships took part in the drugs busts. No arrests were made. Colombia produces about 80 percent of the world`s cocaine and supplies up to 60 percent of the high-grade heroin sold in the United States, according to U.S. Drug Enforcement Administration figures.