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A fire broke out on a train last night.
Four crews were called to Dartford Station, in Station approach, after the train of eight carriages was stopped.
It is belevied someone had set light to a newspaper on one of the seats of the 23.48 Southeastern service from London Bridge.
A member of staff had already extinguished the small fire when the crews from Thames-side and Dartford's red watch arrived on the scene.
Crew manager Bob Chilmaid said: "The fire is believed to have been started deliberately.
"It did not cause much damage."
British Transport Police were also in attendance.