New Delhi, July 1 -- A 34-year-old air conditioner mechanic died after he allegedly fell from the eighth floor of a commercial building in northwest Delhi's Netaji Subhash Place on Sunday afternoon when he was repairing an AC unit on the balcony of a private office. Police said a case on charges of death by negligence has been registered against unknown persons. The deceased, Ram Sevak, was a resident of Wazirpur village and worked at an AC repair shop in Shalimar Bagh. Police said he was cleaning and repairing an old AC in the Aggarwal Cyber Plaza, and since he was sitting on the edge, he slipped and fell. He had arrived at the site with four other workers from the same repair shop. According to police, they received a call about the incid...