Wild video shows item on fire inside F train subway car in New York City

Video shows an unknown item, possibly a bag or jacket, light up in flames on a subway seat, triggering service changes.

NEW YORK (WABC) -- Video shows an unknown item, possibly a bag or jacket, burst into flames on a New York City subway seat in an incident that triggered service changes over the weekend.

The fire started on a northbound F train at the Second Avenue subway station in Manhattan early Saturday morning.

The incident rerouted F trains first to the A line, then over to the E line.

Service resumed within an hour.

Authorities have not confirmed how the fire started or who caused it.

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Wild video shows item on fire inside F train in New York City