The incident occurred when the train was approaching the Ambala Cantonment Railway Station. Passengers brought the train to a halt by pulling the chain, senior GRP official Kamaldeep Goel said.
"A passenger was carrying firecrackers in the compartment. It was kept in a bag under his seat and suddenly exploded. The smoke spread through the compartment causing panic," he said, adding a woman passenger fell unconscious after the incident.
The GRP rushed a team to attend the passengers on receiving information about the incident, Goel said.
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