A disabled Amtrak train was causing delays in and out of Penn Station in the middle of the Monday morning rush hour, the agency said.
The train got stuck in the north tube of the tunnels under the Hudson River at about 8:20 a.m., spokesman Jason Abrams said.
It was removed, and there were no injuries to the 163 passengers or to the crew members, Abrams said at about 9:15 a.m.
NJ Transit, which also uses the tunnels, and Amtrak service was impacted by the disabled train.
There were about 30 minute delays on Amtrak and up to 60 minute delays on NJ Transit, the agencies said.
Check back for updates on this developing story.