Part of the Pennsylvania Turnpike was shut down Friday morning after about 100 vehicles were involved in wrecks, causing traffic back-ups, authorities said.
The crashes started at about 8:25 a.m. when as many as 15 vehicles collided in southern Bucks County, near the New Jersey state line, CNN reported.
About 20 more wrecks happened over a stretch of several miles, spanning two counties, said Pat Ponticelli, Bensalem Township's deputy director of public safety.
At least three people were injured in the crashes. Authorities were still working to determine how many people were hurt.
Bill Capone, spokesman for Pennsylvania Turnpike Commission, said it could be several hours before the wreckage is cleared.
The crashes have not been attributed to weather, but CNN affiliate KYW-TV, Philadelphia, said there was some freezing rain in the Philadelphia area.
The East Coast was hit by a nor'easter winter storm Thursday, with parts of New York City receiving up to 11 inches of snow, and Fairfield, Conn., getting 14 inches, CNN said.
Before the worst of the storm hit, N.J. Gov. Chris Christie said: "This has just been a brutal winter where it never really has gotten warmer. And so the natural melting away of snow and ice is not happening."
At least 16 deaths have been attributed to the storm, including a pregnant woman who was hit by a bulldozer clearing snow in Brooklyn, CNN said.
The nearly full-term baby was delivered by cesarean section at a hospital and was in critical condition.
More than 489,000 people were without power Friday due to the storm -- down from 625,000 outages late Thursday, CNN said.
Original headline: 100 vehicles involved in crashes on Pennsylvania Turnpike
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