Acting on a tip off, police nabbed one Satish and seized 18 quintal doda post from his vehicle last evening, they said.
Satish, a gang member of the inter-state drug traffickers, was carrying the narcotics from Dehradun to Karnal through UP, police said, adding that he was caught during checking.
Police has registered a case under Narcotic Drugs and Psychotropic Substances Act (NDPS) in this connection.