The BJP held its first roadshow in Kolkata on Monday. But, the national party's show of strength did not get off to a smooth start as the police delayed giving permission. It then sanctioned a different route, where at least one shoe was reportedly thrown at the lead vehicle carrying in it top leaders including Kailash Vijayvargiya, Mukul Roy, Arjun Singh and Rakesh Singh. The BJP alleged it was the handiwork of the Trinamool Congress, which dismissed the allegation.