Union Home Minister Amit Shah today called for a CBI investigation into the death of a BJP worker, who was found hanging in mysterious circumstances in Kolkata this morning, hours before his visit to the city. He also asked the Bengal government for a report. Arjun Chowrasia, a member of the BJP's youth wing, was found hanging in an abandoned building near his home in north Kolkata. He was to lead a bike rally later today in one of the events planned for Amit Shah's welcome to Kolkata. The BJP alleged that he was murdered by the ruling Trinamool Congress, which strongly denied it.