NEWARK - New Jersey Transit says trains into and out of Penn Station are operating on or close to schedule after earlier delays of up to 30 minutes.

NJ Transit says the cause of the delay was a disabled Amtrak train in the tunnel that forced all trains to use one tube.

There was an earlier separate 20 minute delay Tuesday due to an Amtrak overhead wire problem. Tuesday's delays come on the heels of delays on four days last week caused by problems with electrical lines.

In the wake of the delays, federal Transportation Secretary Anthony Foxx sent a letter to Governors Chris Christie of New Jersey and Andrew Cuomo of New York urging them to meet with him in the next two weeks to put together a strategy for building new crossings under the Hudson River.