Accused M Venkatraju and G Adinarayana were apprehended by officials of the Prohibition and Excise department while they were transporting the contraband in an ambulance belonging to a primary healthcare centre, Narsipatnam Excise Inspector BVG Raju said.
The cannabis was procured from remote areas under Chintapalle village, he said.
A case under relevant sections of the Narcotic Drugs and Psychotropic Substances (NDPS) Act was registered, Raju said.