Myanmar police say they have seized a huge haul of liquid fentanyl, the first time one of the dangerous synthetic opioids that have ravaged North America has been found in Asia's Golden Triangle drug-producing region.

In a signal that Asia's drug syndicates have moved into the lucrative opioid market, Reuters can reveal more than 3,700 litres of methylfentanyl was discovered by anti-narcotics police near Loikan village in Shan State in northeast Myanmar...