Guangdong police detained two suspects — a Hong Kong resident and a mainlander surnamed Su — after busting a major cross-border drug smuggling ring earlier this month.

More than 100 kilograms of methamphetamine was also seized as part of the operation, code-named Blaze and jointly launched with Australian police in mid-March, according to Deng Jianwei, director of drug enforcement with the Guangdong provincial department of public security.

"Police had previously detained another three suspects as part of another operation in Australia, including a Hong Kong resident, an Australian and a Fijian resident," he told a news conference in Guangdong on Monday.

Deng said the operations had dealt a heavy blow to cross-border drug crimes in Guangzhou, but reiterated that the fight against drugs was not over.

He hinted at more special operations to be launched in cooperation with foreign counterparts in the coming months.