Two Nigerians, identified as Joseph Uyamadu, 43, and Emanuel Umiano, 33, were arrested on Monday by a joint force of narcotic suppression police and naval officers.

They were nabbed, alongside a Peruvian, Ammando William, during a raid at their rented house in a rubber plantation in Ban Kai district of Rayong province.

The house was used to hide a large number of chemicals and materials used in producing drugs.

The search of the house produced an amount of cocaine hidden in the flush tank, a bag containing black and sticky substance similar to raw opium, black sheets of substance, choric acid, electric grinder, a microwave oven, kerosene, and  two cars.

The black sheets of substance are suspected to be chemical substance used in producing drugs, a narcotic police officer said, but added they have to be tested in the laboratory.

The three suspects were detained at Ban Khai police station pending investigation into their drug records.