Long Island Rail Road commuters should expect delays during Wednesday's evening rush.
A third-rail cable caught fire in one of the East River tunnel tubes earlier in the day and crews are still making repairs, officials say.
As a result, the railroad is canceling or combining eastbound trains for the evening.
Westbound service from Jamaica to Penn Station is also suspended. Customers can use the E subway train instead.
A Penn Station-bound train had gotten stuck in one of the tubes when the fire broke out, officials said. About 100 people were on board, but there were no injuries.
Customers can check mta.info/lirr for the latest.
Andrew Siff contributed to this report.