ST. LOUIS (AP) — The Coast Guard says it is responding to a fuel spill on the Mississippi River near Granite City.

The guard said in a news release Thursday that a vessel was damaged Thursday while using Lock and Dam 27, rupturing a fuel tank.

The fuel tank holds approximately 20,000 gallons. The fuel is reportedly contained inside the lock and dam.

The Mississippi River is closed at Lock and Dam 27 until clean-up is complete.

An investigation into the spill is continuing.