Police arrested three persons on Tuesday in connection with smuggling ganja (cannabis) to Sri Lanka and also recovered Rs 50 lakh worth contraband from them.
Police said they were on a look out for four other members of the gang.
Acting on a tip-off that a plan to smuggle ganja to Sri Lanka was underway, police intercepted a car transporting 100 kg of Ganja in 47 bundles and packed in five gunny bags, each weighing 20 kg, said 'Q' branch Inspector Kennedy.
Three persons in the car were arrested, while four others who had come to buy the narcotic from them escaped on seeing police search the vehicle, he said.
The car was seized and a case was registered against seven persons, including the car owner.
Kennedy said the gang had procured the contraband from a person in Madurai and planned to smuggle it to Sri Lanka. (Source: DNA)