In Tamil Nadu, railway track on the Villupuram section near Sithani was damanged by a blast in the early hours of this morning. <br/><br/>Police sources said passengers of the Rockfort Express had a miraculous escape when the train driver stopped the train few yeard away from the blast site. No one has been injured in the blast.<br/><br/>The Police are investigating the cause of the blast. A written note from the blast site has been recovered. <br/><br/>Following the incident a number of trains from the Southern districts to Chennai have been delayed and the departurwe of some trains from Chennai to Southern Districts have been delayed.<br/>