PM visited riot hit Muzzafarnagar on Monday along with Sonia Gandhi and Rahul Gandhi. Manmohan Singh called the violence as the biggest incident ion two decades. <br /><br />The Bharatiya Janata Party on Monday said the visit of Prime Minister Manmohan Singh, Congress chief Sonia Gandhi and vice-president Rahul Gandhi to the violence-hit Muzaffarnagar district is nothing but "secular tourism on communal riots".