As smoke was seen coming out from the coach around 11:40 AM, the driver was alerted and the train stopped in between Gahmhar and Chausa station under Danapur division of East Central Railway (ECR), Additional Divisional Railway Manager B K Singh said.
There was no report of any casualty, he said.
After the 12402 Magadh Express was stopped, five bogies including the one which caught fire were detached, and brought to Chausa station before Fire Brigade personnel doused the flame.
DRM Danapur N K Gupta rushed to the site along with relief and engineers team.