BJP President JP Nadda flagged off BJP's Parivartan Yatra at Tarapith in West Bengal's Birbhum and Lalgarh and offered prayers at the Tarapith temple on tuesday. JP Nadda also targeted CM Mamata Banerjee during a election rally. At the same time, Mamata also counter attacked at Nadda accusations at rallies in East Bardhaman and Murshidabad district. Watch video.