The Federal Communications Commission on Monday said it has begun proceedings to withdraw recognition from seven test labs owned or controlled by the Chinese government, citing U.S. national security concerns.

The U.S. telecom agency in May voted to finalize rules barring Chinese labs deemed risks to U.S. national security from testing electronic devices such as smartphones, cameras and computers for use in the United States.

The FCC also said on Monday that U.S. recognition of four other Chinese labs have expired since May and will not be renewed, including two that sought extensions.