An explosion has been confirmed at New York City's Port Authority. The explosion occurred during morning rush hour and major evacuations were ordered in the area, NBC News reported.

A single suspect, who reportedly sustained a "minor injury," is in NYPD custody. He has been identified as 27-year-old Akayed Ullah, a Brooklyn resident who police believe was inspired by ISIS. The NYPD is reporting he was wearing an "improvised low-tech explosive device" during his attack. They are also calling the incident "terror-related."

The New York Police Department first confirmed Monday morning they were "responding to reports of an explosion of unknown origin at 42nd Street and 8th Ave." A, C, and E lines were being evacuated. "Info is preliminary," an NYPD spokesperson said.

Mayor Bill de Blasio has been briefed on the explosion.

"As I was making my way toward the outside, I kept getting shoved by cops and there were cops at every entrance blocking and there was police and SWAT everywhere," witness Francisco Ramirez told CNN. "It was scary. It was just a lot of chaos but I didn't see any injuries."

This story is developing.