Baltimore ? A freight train carrying hazardous materials derailed Saturday morning near the center of this city, but there was no sign of a leak or spillage, the fire department said.

No injuries were reported, and there was no sign of a leakage or spill, fire department Capt. Roman Clark said.

By afternoon, authorities were removing the wreckage and allowing traffic and pedestrians back into the vicinity after repeated air samples showed no sign of danger.

About a dozen cars of the 131-car CSX Transportation Inc. train came off the tracks at about 8 a.m. and one car turned on its side in an industrial park just south of downtown, Clark said.

The cause remained under investigation.