WATCH: Surveillance Captures Pipe Bomb Exploding in NYC Subway Near Port Authority Bus Terminal

Surveillance footage captured the moment a small pipe bomb exploded in a New York City subway passageway near the Port Authority Bus Terminal Monday morning.

The video shows commuters shuffling through an underground subway passage 200 feet away from the Port Authority bus terminal at West 42nd St. and Eighth Ave., sources told the New York Daily News.

Port Authority police quickly apprehended the suspect, whom the NYPD identified as Akayed Ullah, a 27-year-old Bangladeshi national who came to the U.S. in 2011.

The FDNY says that Ullah and three others injured in the blast are being treated for non-life-threatening injuries at Bellevue Hospital.

Breitbart News reported that Ullah is the fourth Bangladeshi national accused of terrorism over the past decade. The Department of Homeland Security confirmed that Ullah came to the U.S. through “chain migration,” a process where new immigrants are allowed to bring as many foreign relatives to the U.S. as possible.