Over the years , NSI has been accused several times of aiding Indian separatists form North-East and Kashmir . Indian government and media has accused Bangladesh for involvement in 2002 attack on American cultural centre in Kolkata . They have also blamed NSI along with DGFI and ISI for several attacks on Assam , Tripura and Bihar . Several high ranking NSI officers and field officers were sacked by BNP government after found connected with the 10-Truck Arms and Ammunition Haul in Chittagong case , and were later convicted , who were : NSI 's name had appeared several times during the trial of the mysterious murder of labour rights activist Aminul Islam in April 2012 . The only convict , Aminul ’s friend Mostafijur Rahman was found a mystery man , about whom no one knew much , who appearantly had a cover job at an EPZ clinic and regularly met with security officers , is believed to be linked with NSI , though the court has not asked the agency for clarification and nor did the prosecution try to bring them , media has speculated such controversies , though denied by the agency .
2002 attack on American cultural centre in Kolkata
2002 attack on American cultural centre in Kolkata
National Security Intelligence