PHILADELPHIA (WPVI) --Investigators say a rock is likely to blame for the damage to an Amtrak train window, which was hit as it traveled through the Bridesburg section of Philadelphia.
The incident was reported at 6:55 p.m. Sunday on Amtrak's northbound Acela Express 2222, which originated in Washington, D.C. and was heading to New York.
Pictures showed a pock-mark-shaped gouge in the window with several cracks radiating outward from the center.
"All of a sudden, there was a really loud boom," said Taylor Lorenz of Brooklyn, who posted photos of the window on social media Sunday night.
"When it hit, it was sort of a thump, like someone had slammed down a tray table really hard or dropped a stack of books. It wasn't really clear what it was or where it had come from," she said.
Amtrak says none of the 201 passengers on board the train were hurt.
The train was stopped at Amtrak's Metropark station in Iselin, N.J. so inspectors could check for other damage.
Nothing else was found, and the train proceeded to its final destination, Penn Station in New York City, where it arrived without further incident at 8 p.m.
At the time, the train was traveling through Bridesburg, close to where Amtrak train 188 derailed in May, killing eight people..
Reginald Osborne of Harlem is seen in some of the photos. He was sitting right next to the broken window.
"It cracked it. It didn't shatter it, but you could see where it left an imprint like a bullet," Osborne said.
Amtrak said the train car windows are reinforced to meet the specifications of the Federal Railroad Administration's regulations.
At 30th Street Station on Monday, riders said they consider the trains safe, and such incidents are not something that will keep them from riding the rails.
"You really can't live your life worried about such things and the probability of such things tend to be so small. I really do feel safe," said Lisa Schweitzer of Glen Mills, Pa.
"There are just things that are out of everyone's control. Hopefully, people understand that and don't cause too much of a fuss," said Joshua Buitrago of Lancaster, Pa.