© Edwin Valero/Associated PressTrain cars were lying nearly on their sides after the derailment along the Hudson River.
At least four people were killed after a Metro-North Railroad train derailed Sunday morning in the Bronx along the Hudson River, officials said.

A total of 67 people were injured - 11 critically - a New York Fire Department spokesman, Jim Long, said.

The derailment occurred when several cars of a train headed south from Poughkeepsie, N.Y., left the tracks about 7:20 a.m. near the Spuyten Duyvil station under the Henry Hudson Bridge on the Hudson Line, according to a Metropolitan Transportation Authority spokesman, Aaron Donovan.

Councilman G. Oliver Koppell, who represents the area and was at the scene, said the accident was "certainly the worst one on this line."

Rescue workers from the Police and Fire Departments converged on the scene and lowered stretchers into the train cars, which were lying nearly on their sides; one car was just above the water.

The train was the 5:54 a.m. out of Poughkeepsie, and was due at Grand Central Terminal at 7:43 a.m., Mr. Donovan said.

"We are just not sure" what caused the derailment, he said. "That will be the subject of a detailed investigation."

A freight train derailed near the same station in July.

All service between the Croton-Harmon station and Grand Central Terminal was suspended, Mr. Donovan said.