Om Prakash, Wasim Shah and Manawar Farooq were "notorious" drug peddlers and were arrested during a vehicle check at Manjakote town last evening, a police spokesman said.
He said the trio, on noticing policemen, stopped their vehicle and tried to flee.
"The trio were arrested and a search led to the recovery of narcotics, including heroin, from their possession," the spokesman said.
He said a case under various sections of the Narcotic Drugs and Psychotropic Substances (NDPS) Act was registered against them.