Taranto, January 26 - Police conducted an anti-drug operation with hundreds of officers on Tuesday that they said dismantled three different criminal groups and netted 30 people accused of involvement in drug dealing in the Puglia city of Taranto. Of the 30 suspects, five were put in jail, with police unable to find the sixth person ordered to jail; 21 were placed on house arrest; and three were issued mandatory residency orders. "The drug dealing was organised on an industrial scale," said Taranto police chief Stanislao Schimera. "During the course of the investigation more than 15 kilograms of drugs were seized. The arrested had links with members of criminal groups in Calabria and Bari".