Lucknow: A police sub-inspector was shot dead in Uttar Pradesh's Badaun districts during a gun battle with armed assailants, police said on Thursday. The incident took place on the Bareilly highway late Wednesday night in which sub-inspector Sarvesh Yadav was shot dead and two other policemen were injured in the exchange of fire. An official said during checking, three assailants on a bike were intercepted on a tip-off that they were on the way to a loot. As the police team tried to stop and check them, they opened fire, killing the sub-inspector on the spot. One injured assailant was nabbed by the policemen while two managed to escape. The condition of police constable Pramod is stated to be critical, the official added.