Acting on a tip-off, the Customs Headquarters Preventive Unit sleuths yesterday seized the truck at Diengpasoh on the Shillong bye-pass, Deputy Commissioner I R Kharkongor said.
No one has been held in this connection as there was no occupant in that truck, the officer said.
1027.260 kg of cannabis, concealed inside a chamber behind the driver's cabin, was seized from the truck bearing Punjab's registration number, Kharkongor said.
A case has been registered under the Narcotics Drugs and Psychotropic Substances Act, 1985, he said, adding the investigation has been launched to nab the persons involved.