WASHINGTON, May 29 (UPI) -- A Chinese national pleaded guilty in a U.S. courtroom to charges she was involved with a spy ring.

ALEXANDRIA, Va., May 13 (UPI) -- A New Orleans man has pleaded guilty in Alexandria, Va., to a charge of delivering defense information to China, U.S. officials said.

WASHINGTON, March 31 (UPI) -- A U.S. Defense Department official pleaded guilty Monday to an espionage charge for passing along national defense information to China.

WASHINGTON, Feb. 11 (UPI) -- U.S. agents arrested a Defense Department official and two others Monday on charges of spying for China.