Internet security experts believe “almost all” powerful institutions in the nation’s capital have been penetrated by Chinese “cyber-spies,” despite persistent denials by China about such activity.

The Chinese military has intruded into at least 141 organizations over seven years, stealing terabytes of data from each, according to a report released Tuesday by Mandiant, a U.S cybersecurity company.

Mandiant concludes in its analysis that that the group of cyber-espionage operators, which it labels APT 1 (APT for “advanced persistent threat”), “is likely government-sponsored and one of the most persistent of China’s cyber threat actors.”

The listing of major Washington institutions allegedly hacked in recent years includes government agencies, congressional offices, think tanks, news organizations, law firms, contractors, human rights groups, and foreign embassies.

No company is safe.