Passengers in the C5 coach of the Thiruvananthapuram-Kasaragod Vande Bharat Express experienced some tense moments after a powder-like smoke engulfed the bogie as the train was nearing the Aluva railway station in Ernakulam district of Kerala around 8.55 a.m on February 28. Fire extinguisher activated Though the passengers initially suspected a leak from the air-conditioning unit, the Railways have clarified …