Bharatiya Janata Party (BJP) workers staged a protest near Parnasree Police station in Kolkata after actor-turned-politician Mithun Chakraborty's roadshow was cancelled on Thursday.Speaking on the same, Chakraborty said, I have done almost 37 campaigns today. I want to know the cause of cancelling the roadshow. Did you see anything coming from our side that could start violence? All of it is coming from that side.