Gumla (Jharkhand), Feb 17 (PTI) Maoists and ultras of PeopleĀ's Liberation Front of India (PLFI) exchanged gunfire in Jharkhand's Gumla district but there is no report of any casualty yet, police said today. The rival extremists traded fire for about two hours last night at Karamtoli in the district. It was being ascertained whether there was any casualty during the gun fight, the police added.