CHANGSHA - Police have recently busted a drug manufacturing ring in Central China's Hunan province and arrested 14 suspects from both home and abroad, it was announced on Wednesday.

The suspects include three from Hong Kong and one from Mexico, according to a press briefing organized by the Hunan provincial public security bureau.

Those arrested are suspected of having set up a drug manufacturing factory in a mountainous village in Guiyang county and disguised it as a pig farm in January 2012, according to the briefing.

Police from Hunan and neighboring Guangdong province seized 218.35 kg of methamphetamine crystals, 901.9 kg of methamphetamine liquid, 160 kg of caffeine, 19.8 tons of chemicals for drug production and equipment worth about 100 million yuan ($15.9 million) in the operation in September 2012.

They destroyed the factory, according to the briefing.