An Army National Guard helicopter has crashed off the northern coast of Puerto Rico, killing one person. Five others are feared dead.Officials say the personnel were supporting an anti-drug operation on the neighboring island of Vieques when the UH-72 helicopter crashed late Monday. The cause of the accident was not clear, but reports say the aircraft had changed its route because of bad weather.Search and rescue coordinators say the body of one person was found about one-and-a-half kilometers off the Puerto Rican coast. The U.S. Coast Guard says it is assisting local government responders in searching for the other victims and has located a debris field off the U.S. Caribbean territory.Officials say two of the six on the helicopter were prosecutors with the local Justice Department, and the other four were National Guard personnel – Voanews