Tirupattur, Nov. 2 -- Seven empty railway coaches, which reportedly rolled away unattended from the railway yard at Jolarpettai Junction in Tamil Nadu's Tirupattur district, travelled nearly six kilometres without an engine before derailing near Thamaleri Muthur, disrupting train services between Bengaluru and Chennai.

The incident triggered an emergency response, with railway authorities alerting officials to stop trains approaching Jolarpettai from Bengaluru at various locations to prevent a possible collision. A major accident was reportedly averted after the gatekeeper on duty heard the unusual noise of the derailed coaches and immediately alerted railway authorities.

According to preliminary information, the seven empty coaches had...