A high-security alert has been sounded across Nagpur after an anonymous letter claimed that radioactive material had been planted at key locations, including the RSS headquarters and a BJP office, officials said on Thursday.
Police said the letter was received at the office of Police Commissioner Dr Ravinder Singal on April 27.
The police have formed multiple teams and roped in the National Disaster Response Force (NDRF) and energy experts. They carried out extensive searches at the places mentioned in the letter, but have not found any traces of radioactive material so far.
The police suspect that the letter could be a hoax, and a probe was underway.
Written in English and purportedly sent by an organisation calling itself 'DSS', the letter contained objectionable remarks and warned that Caesium-137, a highly radioactive substance, had been planted at several places in the city, police sources said.
The letter specifically mentioned the Rashtriya Swayamsevak Sangh (RSS) headquarters, Smriti Mandir (a memorial dedicated to RSS founder Dr K B Hedgewar and the organisation's second chief M S Golwalkar), a BJP office in Ganeshpeth.
It also said the radioactive material has been planted under the seats of Metro trains on the Orange and Aqua lines, and 'Aapli Bus' services operating near these areas.
The letter also claimed that the material was sourced from a cancer hospital, and warned of a city-wide radiation threat.
