The National Investigation Agency, on Thursday, arrested tribal rights activist Stan Swamy in the Bhima Koregaon violence case. The 83-year-old Swami has been arrested by the agency from his house in Bagaicha, Ranchi. Stan Swamy's name is among the eight people accused of allegedly plotting to assassinate India's Prime Minister Narendra Modi and for allegedly inciting the violence in Bhima Koregaon, Pune on December 31, 2017