Multiple casualties reported after train crashes into Hoboken station in New Jersey

At least three people were killed and more than 100 were injured after a commuter train crashed into a train station in Hoboken, New Jersey, at about 8:30 a.m. on Thursday, multiple outlets have confirmed, citing New Jersey Transit officials.

The cause of the crash, involving NJ Transit's No. 1614 train on the Pascack Valley Line, was not immediately identified. A WFAN radio anchor who witnessed the crash said the train "simply did not stop" and "went right through the barriers and into the reception area."

A witness told reporters he saw the train engineer "slumped over in the front of the train." The engineer was unresponsive when he was taken out of the train, CNN reported. It is unclear if he survived.

Many police officers and firefighters were seen outside the terminal after the crash, some attending to injured people. A woman who was in the front car of the train that crashed told CBS that people in her car were injured, and she thinks the train hit people waiting on the platform.

Annmarie Mercieri, a Hoboken resident, was at the station when the crash occurred.

"I heard a lot of screeching and a big impact," she told Business Insider, noting that emergency responders quickly blocked off the scene.

"People seemed shaken up by it, but they were still pretty calm," she said. "I've never seen anything like that in my whole life."

It is unclear how many people were on the train when it barreled into the station and crashed onto the platform during the rush-hour commute, but a passenger told NBC it was "crowded - especially in the first and second cars."

Matt Hladik, a bystander who witnessed the aftermath of the crash, told Business Insider "people are trying to go about their commute, but it is mass chaos with first responders and everything happening at once."

"Apparently the train crashed right through the station," he added. "I saw some people getting medical attention, hoping no serious injuries."

A passenger on the train told NBC he saw "a woman pinned under concrete."

"A lot of people were bleeding," he added. "One guy was crying." 

This video appears to show the crashed train:

The roof of the train station apparently collapsed:

Firefighters and first responders were on the scene:

The Hoboken terminal is just across the Hudson River from lower Manhattan. It is one of New Jersey's busiest train stations; roughly 15,000 people board a train at the terminal every day.

This is a developing story.