In Tamil Nadu, four persons were killed when three vehicles were involved in an accident early this morning at Madurantakam in Chengalpet district. The incident happened at the Chennai Trichy Highway when a private bus hit a lorry  which was going ahead. In the melee, a Government bus which was running behind the private bus also hit the vehicle. Four passengers including a woman who were travelling in the private bus were killed on the spot. The injured were admitted to the Chengalpattu Government Hospital. Police have registered a case and an enquiry has been ordered in the accident.