Scores of people were arrested Tuesday in a major operation against organised crime and drug trafficking in Bosnia's Serb entity Republika Srpska, police said. More than 540 police took part in operation 'Network 2010', aimed at dismantling gangs dealing in drugs as well as stolen cars and contraband cigarettes, Bosnian Serb police chief Uros Pena told the Srna news agency. Police made 102 arrests, with 10 set to appear in court, the official said. They also recovered automatic weapons, grenades, ammunition, cannabism, heroin and cocaine in raids across the entity. Republika Srpska is one of two entities that make up Bosnia-Hercegovina, formed after the end of the 1992-1995 war sparked by the break-up of the former Yugoslavia. 