The Sriganganagar police today claimed to have busted two gangs which were involved in four incidents each of gold chain snatching and theft of motorcycles.Ram Niwas Ramu and Dev Ratan have been held. They have been accused of snatching gold chains from women in Aggarsein Nagar, Sheetla Mata Vatika and Nehra Nagar in the past few months.Two youths and a minor boy have been rounded up in connection with the theft of motorcycles.