PHILADELPHIA -- A freight train accidentally pulled down electrical lines on Saturday near Linden, N.J., cutting power to commuter rail tracks along the Northeast corridor and causing hours of delay for thousands of Amtrak and New Jersey Transit passengers, the Philadelphia Inquirer reports.

Amtrak warned that passengers in Philadelphia and other cities on the corridor might still face delays of two to five hours today if crews did not succeed in restoring power by morning. "We'll try to get the railroad up during the night," said spokeswoman Cecilia Cummings.

Just one of the corridor's five tracks was running late last night, Cummings said.

The trouble started about 5:45 p.m., when a freight train owned by Norfolk Southern and CSX railroads knocked down wires. NJ Transit, which uses Amtrak-owned tracks, said its Raritan Valley, North Jersey Coast and Northeast Corridor lines were affected.