A US grand jury has indicted five Chinese individuals with cyber espionage charges for allegedly targeting six American companies and stealing trade secrets, publicly accusing China of cyber spying for the first time. The hackers targeted US companies in the nuclear power, metals and solar products industries to steal information useful to competitors in China. The companies targeted include Alcoa Inc, United States Steel Corp, Allegheny Technologies Inc, Westinghouse Electric Co and US subsidiaries of SolarWorld AG , US officials said. The hackers also targeted United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied-Industrial and Service Workers International Union (USW), officials said. The hackers targeted US companies in the nuclear power, metals and solar products industries to steal information useful to competitors in China, the department said. More details were expected at a news conference later with Attorney General Eric Holder and other U.S. officials.