Updated at 12:37 p.m.
State and city officials say 13 cars that derailed on a Pittsburgh freight train were empty and injured nobody.
Guy Costa, the city's director of operations, says the 13 cars derailed shortly after 10 a.m. Thursday. Costa says the entire train, not just the derailed hopper cars, was empty. John Poister, a spokesman for the Pennsylvania Department of Environmental Protection confirmed the information and says nobody was hurt.
Only the city of Pittsburgh responders were needed, said Michael Huss, the city's deputy director of public safety.
"There are no injuries. The cars were empty," he said. "There are no hazardous materials or concern to the public.”
Huss said the cause of the derailment is unknown.
Video from Pittsburgh television stations was showing hopper cars toppled onto their sides or leaning over. The train does not appear to be completely off the tracks.
Allegheny Valley Railroad officials confirm the train is theirs, but declined to comment otherwise. The company's website shows the railroad operates 77 miles of track in Pittsburgh and its suburbs, and connects with lines run by four other freight railroads.
The cars tipped over in the city's Hazelwood section, not far from the Hot Metal Bridge, which crosses the Monongahela River a couple of miles east of downtown.