Amtrak police — who are supposed to be the lead law-enforcement agency at Penn Station — say they are woefully unprepared for a terrorist attack at the massive transit hub.

The cops have inadequate resources, and there is little coordination between them and other groups, mainly the NYPD, their union said.

“The last time we did a multi-agency drill was about 10 years ago,” David Pearlson, president of the Amtrak Police Labor Committee, told The Post on Friday.

“One of the key issues we’re trying to solve is how to interconnect everybody,’’ he said. “If there’s only one person to talk to at the NYPD, where is that person and where is the radio?”

Meanwhile, only five Amtrak officers typically patrol Penn Station at any given time, Pearlson said.

He cited the chaos in Penn Station last Friday as a warning. An irate man was tasered, sending freaked passengers fleeing through the station thinking shots had been fired.

“Most people evacuated, and in a mass shooting, that’s what we want,” Pearlson said. “But we need it to happen safe and orderly. People started rushing and jumping over each other.”

Mayor de Blasio said Friday that City Hall will review the situation.

Deputy Chief Timothy Trainor, an NYPD spokesman, said the NYPD met Thursday at Penn Station to discuss last week’s incident with Amtrak and other agencies and are “developing joint exercises to improve responses and police services at Penn Station.”

“Though the MTA and Amtrak are the primary stakeholders for the policing of Penn Station, the NYPD remains ready to work collaboratively and extensively with those stakeholders responsible for policing Penn Station,” Trainor said.