The U.S. Coast Guard says it has responded to an oil spill in the Arthur Kill waterway near the Goethals Bridge.

A commercial container ship began leaking fuel while moored at the Global Marine New York Container Terminal off Staten Island around 2 pm Thursday, the Coast Guard said. A pollution response team from the Coast Guard was at the scene.

The Coast Guard says crews have placed a containment boom and are in the process of skimming and cleaning up the waterway. The NYPD has also responded to the incident.

It's not clear how much fuel has spilled.

A unified command has been established to coordinate the cleanup and re-establish marine transportation.

The cause is under investigation.

Information from the Associated Press was used in this story.