An email between Rona Wilson, one of the arrested activists, and a Maoist leader, speaks of ending "Modi-raj" with a 'Rajiv Gandhi-type incident', Additional Director General (law and order) Parambir Singh told reporters here. Wilson was arrested in Delhi in June in connection with the Koregaon-Bhima violence in Maharashtra in January. Police have seized "thousands of letters" exchanged between the overground and underground of Maoists, he said. Pune police had on August 28 raided the homes of prominent Left-wing activists in several states and arrested five of them - Varavara Rao in Hyderabad, Vernon Gonsalves and Arun Ferreira in Mumbai, Sudha Bharadwaj in Faridabad and Gautam Navalakha in Delhi.