Firefighters were sent to Penn Station late Wednesday afternoon, after smoke filled an electrical room.
The MTA says A and C train service in Upper Manhattan has resumed with residual delays after an earlier disruption due to a smoke condition that apparently began in a transformer.
There were some scary moments aboard a No. 7 train when a fire broke out on the tracks. The incident occurred Monday night on a Queens-bound train near Grand Central Terminal.
The LIRR said customers should expect canceled trains and delays during the evening rush hour.