Some 12, 000 suspects have been arrested over drug-related offences in a narcotics eradication campaign which ended recently, the Police said.
The Police Narcotics Bureau (PNB) carried out a special narcotics prevention campaign across the island from 10 September to 10 October in order to prevent the drug menace.
The police said it seized 67.5kgs of heroin, 43.2grams of cocaine, 943.1 kilos of cannabis and Kerala cannabis.
A total of 4,322 suspects have been arrested over heroin related offences while 7,232 suspects have been arrested over offences related to cannabis and Kerala cannabis.
The PNB, the Special Task Force (STF) and the Police carried out the operations.