Watch: Moment large fire explodes on New York train line
A transformer fire in the Bronx caused an explosion, disrupting Amtrak train services and suspending trains between New York and New Haven.
Video footage captured thick smoke and the explosion's impact. Firefighters took three hours to bring the flames under control.
The fire began at a nearby warehouse and spread to a substation. Authorities are investigating the causes of both fires. No injuries were reported.