The Port Authority Bus Terminal in Manhattan was evacuated during the Monday morning rush hour after a pipe bomb explosion underneath the building, according to the NYPD. The suspected ISIS-inspired terrorist and three others were injured, officials said. Police identified the suspect as Akayed Ullah, 27, of Brooklyn.

Akayed Ullah, the suspect identified by police in
Akayed Ullah, the suspect identified by police in the explosion beneath the Port Authority bus terminal on Monday, Dec. 11, 2017, lies injured on the floor after the explosion. (Credit: Dominick Izzo)
Akayed Ullah, the suspect identified by police in

Akayed Ullah, the suspect identified by police in the explosion beneath the Port Authority Bus Terminal on Monday, Dec. 11, 2017.

(Credit: AFP/Getty Images/New York City Taxi and Limousine Commission)
This photo from a 2011 drivers license shows

This photo from a 2011 drivers license shows Akayed Ullah, the suspect in the explosion beneath the Port Authority on Monday, Dec. 11, 2017. Ullah is suspected of strapping a pipe bomb to his body and setting off the crude device under 42nd Street between Seventh and Eighth Avenues, injuring himself and a few others. 

(Credit: AP)

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A woman wearing a headscarf is escorted to

A woman wearing a headscarf is escorted to a police car by members of the New York City Police Department outside a Brooklyn address on Ocean Parkway associated with suspected terrorist Akayed Ullah on Dec. 11, 2017 in New York City. The Police Department said that Ullah is in custody after the explosion. It happened in a subway passageway that connects Times Square to Eighth Avenue.

(Credit: Getty Images/Stephanie Keith)
NYPD and FDNY officials place a person into

NYPD and FDNY officials place a person into an ambulance on 8th Avenue between 42nd and 43rd streets after an explosion beneath the Port Authority of New York and New Jersey bus terminal in Manhattan Monday morning, Dec. 11, 2017. 

(Credit: Craig Ruttle)
Law enforcement officials work following an explosion near

Law enforcement officials at the scene after a suspected terrorist tried to detonate a homemade pipe bomb beneath the Port Authority of New York and New Jersey bus terminal in Manhattan during Monday morning, Dec. 11, 2017, officials said.

(Credit: AP/Andres Kudacki)
From left, NYPD Commissioner James P. O'Neill, New

From left, NYPD Com­mis­sion­er James P. O'Neill, New York Gov. An­drew M. Cuomo, and May­or Bill de Blasio ar­rive Mon­day, Dec. 11, 2017, for a news con­fer­ence  af­ter an ex­plo­sion beneath the Port Authority of New York and New Jersey bus terminal in Manhattan Mon­day, Dec. 11, 2017.

(Credit: Craig Ruttle)
Police and other first responders respond to a

Police and other first responders respond to an explosion at the Port Authority Bus Terminal on Monday, Dec. 11, 2017, in Manhattan. 

(Credit: AFP / Getty Images/Bryan R. Smith)

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Port Authority Police watch as people evacuate after

Port Authority Police watch as people evacuate after an explosion at the Port Authority Bus Terminal on Monday, Dec. 11, 2017, in Manhattan.

(Credit: AFP / Getty Images/Bryan R. Smith)
Port Authority Police watch as people evacuate after

Port Authority Police watch as people evacuate after a reported explosion at the Port Authority Bus Terminal on Monday, Dec. 11, 2017, in Manhattan. 

(Credit: AFP / Getty Images/Bryan R. Smith)
FBI and police respond to a reported explosion

FBI and police respond to an explosion at the Port Authority Bus Terminal on Monday, Dec. 11, 2017, in Manhattan.

(Credit: AFP / Getty Images/Bryan R. Smith)
Police block off a sidewalk while responding to

Police block off a sidewalk while responding to an explosion near Times Square on Monday, Dec. 11, 2017, in Manhattan. 

(Credit: AP/Mark Lennihan)
A crowd moves past police responding to a

A crowd moves past police responding to an explosion near Times Square on Monday, Dec. 11, 2017, in Manhattan. 

(Credit: AP/Mark Lennihan)

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First responders on scene of a possible explosion

First responders on the scene of an explosion below the Port Authority building in Manhattan on Monday, Dec. 11, 2017.

(Credit: Craig Ruttle)
First responders on scene of a possible explosion

First responders on the scene of an explosion below the Port Authority building in Manhattan on Monday, Dec. 11, 2017.

(Credit: Craig Ruttle)
Police respond to a report of an explosion

Police respond to an explosion near Times Square on Monday, Dec. 11, 2017, in Manhattan. 

(Credit: AP/Charles Zoeller)