A high-security alert was reportedly issued across Nagpur district in Maharashtra after an anonymous letter claimed that radioactive material had been planted at several sensitive locations in the city, including the RSS headquarters and a BJP office, reported the PTI. The letter was received at the office of Police Commissioner Dr Ravinder Singal on April 27, officials said, the news agency reported. The letter, written in English and allegedly sent by a group calling itself “DSS”, claimed that Caesium-137, a highly radioactive substance, had been placed at multiple sites, according to the PTI. The locations mentioned in letter According to the news agency, multiple locations were mentioned in the threat letter. It stated that radioactive material was planted at – – Rashtriya Swayamsevak Sangh headquarters – Smriti Mandir, a memorial linked to RSS founders – A Bharatiya Janata Party (BJP) office in Ganeshpeth – Metro trains on the Orange and Aqua lines – `Aapli Bus` services operating in the city The letter also alleged that the material was sourced from a cancer hospital and warned …