The Opposition Bharatiya Janata Party (BJP) on Thursday called for "a united fight to defeat Maoists" but accused the Congress of forging an alliance with the Leftist guerrillas for electoral gains - an allegation that triggered ugly scenes and disruptions in the Lok Sabha.

BJP and Congress MPs were caught in an ugly row over the April 6 Dantewada massacre by Maoist rebels, prompting repeated adjournments of the house.