The incident triggered an emergency response, with railway authorities alerting officials to stop trains approaching Jolarpettai from Bengaluru. | India. Seven empty railway coaches rolled away from the Jolarpettai Junction yard and derailed after travelling six kilometres. Railway authorities were alerted to stop approaching trains from Bengaluru. Seven empty railway coaches rolled away unattended from Jolarpettai Junction and derailed, causing significant train service disruptions between Bengaluru and Chennai.