New York City law enforcement was seen scrambling to the 36th Street Station in Brooklyn, responding to a violent attack inside a Manhattan-bound N train. The New York Police Department identified Frank James as a person of interest.

Videos shared on social media show people running out of the train as soon as the doors of the train opened, followed by a thick blanket of smoke. Alarms went off at the subway station.

The attack turned the morning commute into a scene of horror: a smoke-filled underground car, an onslaught of at least 33 bullets, screaming riders running through a station, bloodied people lying on the platform as others tended to them.

A person is aided outside a subway car in the Brooklyn borough of New York. (Photo Credit: Associated Press)
Travelers help a shooting victim after the train doors were opened. (Photo Credit: Associated Press)
Emergency personnel gather at the entrance to a subway stop in the Brooklyn borough of New York. (Photo Credit: Associated Press)
Law enforcement officials seal off the entrance of the Brooklyn subway station. (Photo Credit: Associated Press)
Officers with bomb-sniffing dogs look over the area after a shooting on a subway train. (Photo Credit: Associated Press)