The Chinese government operates around 100 secret police outposts in other countries around the world. We now know last fall, the FBI raided one of those outposts in New York City.

According to reporting from the New York Times, the FBI raided a third floor office in a six-story building in New York’s Chinatown. The office was under investigation for conducting police operations without jurisdiction or diplomatic approval.

China is suspected of operating similar outposts in Japan, Taiwan, Ireland, Canada, France and several other nations.

It’s not unheard of for police officers to operate in foreign countries, but they usually declare themselves to the foreign government and work in cooperation with local authorities. China not doing so makes these suspected Chinese police outposts all the more concerning.