The police on Thursday arrested four persons, including a juvenile, and seized 1.2 kg of ganja meant for sale at Sultanpet near Villianur.
Acting on a tip-off that ganja was sold at Sultanpet in Villianur police station limits, a team, led by STF Inspector Karthikeyan, was formed.
The team nabbed Balaji, 20, of Samipillaithottam in Muthialpet.
Investigations revealed that Balaji had procured the ganja from Balaji, also hailing from Muthialpet, and a juvenile from Kottakuppam.
The team picked up the two who confessed that they had procured it from Selvakumar of Tiruvannamalai and confessed to supplying it to students. The four were arrested and 1,200 g of ganja and four cellphones were recovered from them.
A case has been registered.