Authorities at Kannur Central Jail seized suspected hashish oil from an inmate named Manoj during a routine check on Tuesday. The contraband, stored in two bottles, was handed over to police, who registered a case under the Narcotic Drugs and Psychotropic Substances Act. An investigation is underway to determine how the drugs entered the high-security prison, with jail officials acknowledging ongoing challenges in curbing narcotics circulation within the facility. A recent arrest of a gang allegedly involved in throwing contraband over the prison wall is also being investigated.