In this file photo, USS Guardian (MCM 5) arrives for a port visit at White Beach Naval Facility in Okinawa, Japan, Jan. 8. (U.S. Navy photo by Mass Communication Specialist 2nd Class Steve White)

SASEBO, Japan - No one was hurt when the mine countermeasures ship USS Guardian (MCM 5) ran aground on Tubbataha Reef at 2:25 a.m. local time, Jan. 17, while transiting the Sulu Sea.

The Avenger-Class ship had just completed a port call in Subic Bay, Olongapo City and was en route to her next port of call when the grounding occurred. The ship is currently stuck on the reef, approximately 80 miles east-southeast of Palawan Island. The crew is currently working to determine the best method of safely extracting the ship.

The cause of the grounding is under investigation.

Guardian, forward-deployed to Sasebo, Japan, was commissioned on Dec. 16, 1989, and has a crew of about 80.

For the latest updates, visit the U.S. 7th Fleet website.