NEW YORK CITY — A fire broke out in an Amtrak train car in one of the Hudson River tunnels near New York’s Penn Station early Friday, injuring five people and disrupting regional rail service. The incident occurred in a rail yard train car before dawn, prompting a response from approximately 100 firefighters.

The Fire Department of New York was dispatched to 31st Street between Seventh and Eighth Avenues around 1:30 a.m. Emergency personnel stood by with stretchers as video from outside Penn Station showed smoke billowing in the pre-dawn hours. The fire was extinguished well before 6 a.m., but not before causing damage to overhead wires.

Two of the five injured individuals were taken to a hospital; their conditions were not immediately known. The fire involved Amtrak's contractor maintenance vehicles, though the cause remains under investigation. Amtrak is investigating the cause of the fire.

The disruption affected multiple rail services that converge at Penn Station, which serves roughly 600,000 passengers daily via Amtrak, the New York subway, New Jersey Transit, and the Long Island Rail Road. Long Island Rail Road service was briefly suspended but resumed by around 7 a.m. New Jersey Transit and Long Island Rail Road announced delays and cancellations, and Hudson River trains operated at reduced capacity.

Amtrak suspended its service into New York until at least noon Friday due to maintenance needs stemming from the fire. Lengthy delays were expected for Amtrak trains traveling north of New York. Equipment issues continued to cause cancellations even after service resumed. Cross-honoring and diversion programs were implemented as the situation developed.

“We sincerely apologize for the inconvenience this may cause.” Amtrak said in its announcement. The railroad pledged to provide updates as new information becomes available. The fire occurred more than a week after a strike had shut down the Long Island Rail Road system.