The administration of U.S. President Donald Trump in its waning days took another swipe at China and its biggest firms on Thursday, imposing sanctions on officials and companies for alleged misdeeds in the South China Sea and imposing an investment ban on nine more firms.

The moves will further increase tensions with China, Washington's strategic rival in Asia, days before President-elect Joe Biden takes office on Wednesday. The Biden transition team did not immediately respond to a request for comment.

Executives of state-owned enterprises, officials of the Chinese Communist Party and military, along with oil giant CNOOC will face new restrictions for allegedly using coercion against states with rival South China Sea claims.