Copenhagen: Danish shipper A.P. Moller-Maersk says armed guards have thwarted a pirate attack on one of its U.S.-flagged cargo ships in the Gulf of Oman.

The Copenhagen-headquartered company says "multiple pirate skiffs" headed toward the 488-feet (148-meter) long Maersk Texas on Wednesday, despite receiving "clear warning signals" from guards onboard.

The pirates opened fire on the ship, and guards returned fire, eventually forcing the pirates to abandon their attack.

No one was injured in the incident and the ship continued on its voyage to the U.S. No other details were immediately available Thursday.

Somali pirates have been increasing their range, but attacks around the vital oil lanes near the Strait of Hormuz remain relatively rare.