Three South African flight schools have been added to the sanctions list for alleged links to China’s military.

The Test Flying Academy of SA (TFSA), Pearl Coral 1173 CC and the AVIC International Flight Training Academy are restricted from exporting and importing goods.

The companies are suspected of posing a risk to U.S. interests.

Meanwhile, the US government said they can be removed from the restriction, if they provide adequate denial of the claims.