Jakarta, June 13 -- Stepping up its war on drugs, the Indonesian government has tightened surveillance in 10 regions across the islands of Sumatra, Kalimantan, and Sulawesi, Coordinating Minister for Political and Security Affairs, Budi Gunawan, has said.

The regions have been prioritized for surveillance by the ministry's anti-narcotics desk as they frequently serve as trans-national drug trafficking routes, he informed in Batam city, Riau Islands province, on Thursday.

The regions comprise Aceh, North Sumatra, Riau, Riau Islands, Jambi, South Sumatra, West Kalimantan, North Kalimantan, East Kalimantan, and the entire west coast of Sulawesi, the minister said.

They account for the majority of drug smuggling cases in the country, he ad...