The Coast Guard said a ship lost power and steering and collided with another ship and a barge docked on the Mississippi River near New Orleans.
Coast Guard spokesman Jonathan Lally said the accident happened Tuesday night at a terminal on the river near Gretna. There were no injuries.
Lally said the outbound Maltese-flagged vessel Flag Gangos struck the Liberian-flagged vessel Pamisos and the barge, both of which were moored at the International Matex Tank Terminals conducting transfer operations.
The crew of a towing vessel was transferring fuel oil from the barge when the barge broke free, causing some oil to be discharged into the river from a hose. The hose was immediately shut off.
The Coast Guard implemented one-way traffic around the terminal.
The cause of the accident is under investigation.