A BJP leader was arrested today for his derogatory tweets on Prophet Muhammad, four days after the violence that erupted in Uttar Pradesh's Kanpur. Harshit Srivastava, an office bearer of the BJP Youth Wing, was trying to spoil the atmosphere through his objectionable posts, police said. "We will act against anyone who tries to play with religious sentiments," said Kanpur Police Commissioner Vijay Meena. The tweets by the leader have been deleted since.