Also I have read about this after coromandel exp tragedy:

In some cases station master can manually override electronic interlocking.
Could that be a possible cause?
Does anyone have further info??
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A similar case to KA Sampark kranti in Feb 2023....

Dilip Kumar, executive director of information & publicity (ED/IP), Railway Board said "Information has been received about the accident of 12578 Bagmati Express. So far, the relief and rescue team from the railway has reached the accident site and the work of evacuating passengers from all the coaches is going on. More than 90% of the passengers have been evacuated. We have not received any information of any casualty or serious injury so far. Both the relief team and the medical team are present at the accident site. GM Sadan Railway and DRM Sadan Chennai Division have left for the accident site. Necessary arrangements are being made by the railway from Chennai station to take the rest of the passengers to their destination..."
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Train no. 12578 Mysuru-Darbhanga Express had rear collision with goods train at Kavaraippettai Railway Station around 20.30 hrs in Chennai-Guddur section between Ponneri- Kavarappettai railway stations (46 km from Chennai) of Chennai Division. Due to this, parcel van which was next to the Engine caught fire, which was doused by Fire brigade. Total 12-13 coaches have derailed. So far, no casualties are reported. All injured passengers are moved to nearby hospitals for further treatment. Train movement in both direction is closed," said CPRO south western railway.




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