Police said Wednesday that seven people had died, after the death toll had risen to six earlier when Temple University Hospital officials confirmed one patient had died of their injuries overnight.

All seven cars of Amtrak Northeast Regional Train 188 derailed and came off the tracks near Frankford Junction on the 2000 block of Wheatsheaf Lane shortly after 9 p.m., officials said. The train was heading to New York from Washington, D.C., and had six passenger cars as well as an engine.

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"All of a sudden it felt like the brakes were hit hard and then our car," said Michael Black, one of the passengers. "We were third from the last, just slowly started going over to the side. I tried to just brace my arm against it and then just got off."

Daniel Hernandez, who lives close to the tracks, heard the derailment.

"It sounded like a bunch of shopping carts crashing into each other," he said.

Hernandez says the crashing sound lasted a few seconds and he heard chaos and screaming.

Mayor Michael Nutter confirmed at least five people were killed in the derailment during a news conference late Tuesday.

"This was an absolute disastrous mess," Nutter said. "I have never seen anything like it in my life. Many of these folks are not from Philadelphia."

Nutter, who said the incident was a "Level 3 mass casualty event," did not speak on a possible cause.

"We do not know what happened here," he said. "We're not going to try to speculate about that."

Governor Tom Wolf arrived at the scene and spoke with Mayor Nutter during another press conference shortly after 1 a.m. Wednesday. Wolf said his thoughts and prayers are with the victims of the crash and all those affected.

Officials have not yet revealed the identity of the deceased victims.

"I've never seen anything so devastating," said Philadelphia Fire Department Deputy Commissioner Jesse Wilson. "They're in pretty bad shape. You can see that they're completely, completely derailed from the track. They've been destroyed completely. The aluminum shell has been destroyed and they've been overturned completely."

Dramatic Images: Train Derails in Philly

Officials say over 140 people were hospitalized and at least six of them are in critical condition. Victims were taken to Temple University Hospital, Aria Health-Frankford, Hahnemann University Hospital and the Albert Einstein Medical Center.

Jefferson University Hospital treated 26 patients, the majority of which had minor injuries, according to a spokesperson.

A spokesperson at Temple University Hospital says they treated at least 36 people who are in various conditions.

An Aria Health spokeswoman says 26 patients were treated at its Frankford location while 50 were brought to its Torresdale hospital.

Hahnemann University Hospital treated about 25 patients with mostly minor injuries and a few traumas according to a spokesman.

Finally, Albert Einstein Medical Center treated 10 patients.

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