UPDATE 8:00 p.m. EST: Train service at Penn Station resumes after it was shut down at 5:20 pm. because of an electrical problem, The New York Times reports.
A power failure affected the switches for trains coming into and out of the station.
Earlier, Twitter user @ashleymarand posted a photo of the madness inside of Penn Station as all Amtrack, New Jersey Transit and Long Island Railroad trains were delayed indefinitely.
Business Insider Emails & Alerts
Site highlights each day to your inbox.