DERA ISMAIL KHAN: Unidentified persons gunned down a prominent socio-political personality of Tank here on Wednesday.Police officials said that Haji Sabir Bhatti, a resident of Madina Colony, was sitting in a hotel near Bab Dera when unidentified assailants opened fire on him, killing him on the spot. The assailants managed to escape after the incident. The motive behind the incident is stated to be a property dispute. The police have registered the case.