All the accused were arrested yesterday and had been remanded to judicial custody today, they said.
Acting on a tip-off that heroin was being smuggled through Tuticorin coast, a team of officials kept a close vigil from Vembar to Therespuram, on Sunday evening.
They then intercepted a boat which was found moving in a suspicious manner off Therespuram coast and recovered six kg of heroin worth Rs six crore from it, the officials said.
During interrogation, the trio had told that the Sri Lankans would come and collect the contraband mid sea.
Later, the customs sleuths, in the guise of traders had ventured into the sea and nabbed the Sri Lankan buyers, they added.
However, the officials declined to reveal the names of the four Sri Lankan Tamils.
Disclaimer: No Business Standard Journalist was involved in creation of this content
