A sub-inspector attached to the MHB police station in Borivli was badly injured after he fell into a nullah while inspecting a body lying on a slab off a railway track bridge that runs over a nullah between Borivli and Dahisar. On Monday evening, the MHB police received information about the body of an unidentified man lying on the slab, under the Sudhir Phadke Flyover.