Six Chinese nationals are in custody over the alleged scam.
Chief of Intelligence and Investigation, Assistant Commissioner of Police (ACP) Henry Brown, confirmed to Fiji Sun.
He said the Chinese were arrested in Lautoka on December 6 after a tip-off.
The Chinese had allegedly withdrawn more than $10,000 (US$5,000) when apprehended and a number of ATM cards were found on them, he said.
He said investigators were now trying to ascertain the origins of the ATM cards and they were liaising with financial institutions.