An STF personnel and two gangsters were killed in a gunfight in Bihar’s East Champaran today. Acting on a tip-off, police reached Chakia, where criminals opened fire, triggering a shootout. STF jawan Shriram Yadav died of injuries, while Kundan Thakur and Priyanshu Kumar were killed. Two associates, Ujjawal Tiwari and Sant Tiwari, were arrested.