Westinghouse spokesman calls on China to withdraw charges . Indictment alleges five Westinghouse officers hacked computers . United Steel Workers Union , China Foreign Ministry , Alcoa among victims , Eric Holder says . U.S. suspends participation in the joint China -U.S. Cyber Working Group .
China Foreign Ministry spokesman calls on U.S. to withdraw charges . Indictment alleges five People 's Liberation Army officers hacked computers . United Steel Workers Union , Westinghouse , Alcoa among victims , Eric Holder says . China suspends participation in the joint China-U.S. Cyber Working Group .