Kolkata, June 10 (ANI): A day after a Congress worker was shot dead in West Bengal’s Murshidabad district, tensions have escalated in the region, with the party alleging that the ruling Trinamool Congress was behind the murder. Congress workers staged a protest outside the election office in Kolkata on June 10 against the murder. Congress worker was killed on the first day of filing nominations for the July 8 Panchayat elections.