A police team on patrol found 60 small bundles of ganja and a country-made bomb at Sourashtrapuram near Vandiyur on Monday night.
The police said six persons fled from Sourashtapuram First Street, along Vaigai riverbed, on seeing the two police personnel from Karuppayoorani police station at around 8 p.m.
The patrol team found the ganja bundles, weighing 50 gm each, and the bomb at the spot.
It may be recalled that two persons were murdered in a fight between two groups of ganja peddlers in the same locality in January 2014.
Karuppayoorani police have seized the bomb and the ganja, and are on the lookout for the culprits.