Seberang Perai Selatan police chief Jay January Siowou said 1.1kg of heroin, as well as heroin base, caffeine, various chemicals and drug processing equipment were seized in the raid on a house in Taman Tambun Permai, Bukit Tambun.

A second raid nearby led to the arrest of a Sri Lankan man with 26kg of caffeine, reported Bernama.

Police also seized two cars and two motorcycles.

Preliminary investigations revealed that the first house was used as a heroin processing lab. The gang is believed to have been actively distributing heroin locally since January. All three suspects have been remanded until Aug 19.