(AP) DUBAI, United Arab Emirates – The U.S|Greg Raelson, a spokesman for the Navy’s Bahrain-based 5th Fleet, gave no immediate word on the fate of the crew Thursday|Raelson says an investigation is under way into crash of the MH-53E Sea Dragon|Navy says one of its helicopters has crashed in the Gulf nation of Oman with five crew members aboard|He says the helicopter was assigned to a mine countermeasure squadron and was involved in heavy lift operations when it crashed 58 miles southwest of the capital Muscat|The official was not authorized to release the information and spoke on condition of anonymity|No hostile activity is suspected|Lt|But an Omani air force official says three of them have been found so far and are being treated in a hospital}