BANGKOK (Reuters) - The largest ever task force assembled to fight organised crime in Asia has identified a long-time drug trafficker, a China-born Canadian national, as the suspected kingpin of a crime syndicate that police say dominates the $70 billion-a-year Asia-Pacific drug trade.

The suspected syndicate leader is Tse Chi Lop, 55, an ex-convict who formerly lived in Toronto and has moved between Macau, Hong Kong and Taiwan in recent years, according to counter-narcotics officers from four countries as well as law enforcement documents reviewed by Reuters. Authorities have not publicly identified Tse as the boss of the drug trafficking group.