The Oceania Customs Organisation secretariat says it worried about this phenomenon.
The organisation's head, Seve Paeniu, said countries in Micronesia and Melanesia were also experiencing an increase in the use of methamphetamines, with a resulting rise in criminal activity and accompanying societal issues.
Radio New Zealand reported that Paeniu said efforts to combat the trend had uncovered both local and foreign involvement in the illegal trade alongside the increase in criminals being deported in the region.
Paeniu told Fiji media earlier this week there was also evidence of increased local production of meth. He said regional customs officials were being trained in investigation and interrogation techniques to deal with the problem.