A crash involving a tractor-trailer, a dump truck and a passenger car has closed the eastbound lanes of I-76 just east of the Conshohocken curve.
About 300 gallons of diesel fuel has spilled on the roadway because of the crash, which left the dump truck on its side.
One person was taken to hospital for injuries that are described as nonlife threatening.
The crash occurred about 11:20 a.m. near Mile Marker 336, where the expressway goes over Waverly Road in Lower Merion Township, officials said. The eastbound roadway was still closed as of 12:45 p.m.
Only one westbound lane was getting by in the immediate area of the crash.