PAULSBORO, N.J. (November 30, 2012)—Several tanker cars derailed Friday morning on a rail bridge in Paulsboro, N.J., and toppled into a creek.

Part of the bridge has buckled but the full extent of the damage has not yet been determined.

Only one of the derailed train cars has leaked hazardous material.

The Department of Environmental Protection said the car leaked vinyl chloride as a gas and all of it has since dissipated.

The chemical can cause nausea and breathing problems.

Officials at Underwood-Memorial Hospital say 11 people were transported with complaints related to the derailment and five more arrived on their own.

The hospital's communication's office said all are believed to have complained of having respiratory problems.

Residents in three towns were told to stay inside after the derailment.

The cause of the derailment hasn't been determined.