In Chennai's Heavy Vehicles Factory (HVF) at suburban Avadi where battle tanks for the Army are manufactured One employee was killed in a accident, as per the defence sources said. The mishap occurred during the manufacturing process of Russian T-72 tank which also included filling of some gas in the tank, they said without elaborating. A report from Theni, over 500 km from here, identified the deceased as Siva (37) who hailed from Kadamalaikundu in the southern district. ALSO READ: Two drown and three missing in sea Man dies after racing with friends in New Delhi Three persons lost their lives as bus overturned