Malaysian authorities were working Monday to salvage a 45-year-old fast attack naval ship that sank after it struck an unknown underwater object. The navy said in a statement that a leak was first detected in the engine room of the KD Pendekar on Sunday, which quickly flooded the vessel. The crew failed to fix the hole and the 260-ton ship sank underwater hours later off the coast of southern Johor state, it said. All 39 crew members were evacuated safely, with no injuries.