China on Monday accused Washington of breaking into computers at a university that U.S. officials say does military research, adding to complaints by both governments of rampant online spying against each other.
Northwestern Polytechnical University reported computer break-ins in June, the National Computer Virus Emergency Response Center announced. It said the center, working with a commercial security provider, Qihoo 360 Technology Co., traced the attacks to the National Security Agency but didn't say how that was done.
