The Bihar Sampark Kranti Express, operating between New Delhi and Darbhanga, split into two parts while traveling between Karpurigram and Khudiram Bose Pusa stations in the Samastipur railway division. An investigation revealed that the locking pin, which connects the coaches, was missing, indicating it wasn't properly attached during the train's departure...
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from Delhi. This resulted in the coupling unlocking due to a jolt, splitting the train. Two railway officials, a senior section engineer and an MCM, have been suspended pending further investigation. The investigation team, including senior officials, confirmed that the locking pin was never attached. The incident happened on July 29th, when the train was traveling from Darbhanga to Delhi. The train had already departed from Darbhanga on Monday and was heading back to New Delhi.

On Monday, the Bihar Sampark Kranti Superfast Express travelling from Darbhanga to New Delhi experienced a coupling failure near Repura Gumti, disrupting the Samastipur-Muzaffarpur up line for over four hours. This caused significant delays for several trains including the Darbhanga-New Delhi Clone Express, the Vaishali Superfast, the Shaheed Express to Amritsar,...
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and the Gondia Express from Barauni to Gondia. The Bihar Sampark Kranti Superfast arrived in Muzaffarpur 3.54 hours late, the Darbhanga-New Delhi Clone Express 4.29 hours late, the Barauni-New Delhi Clone Express 4.24 hours late, and the Jayanagar Amritsar Shaheed Express 1.25 hours late. Passengers faced significant delays at the station and were provided train status updates every 15 minutes.