Berhampur: Suspected Maoists gunned down a trader in Orissa's Koraput district this evening. Two ultras in their early twenties went to the shop of Kanta Rao (40) at Bandhugaon and shot him dead, police said. The duo fled the spot and a manhunt has been launched to nab them, police said, adding that senior police officers have rushed to the spot. The motive behind the killing was yet to be ascertained, police added.