China has suspended visits by US Navy ships and aircraft to Hong Kong after Washington passed legislation last week backing pro-democracy protesters.

Beijing also unveiled sanctions against a number of US human rights groups.

It comes after President Donald Trump signed the Human Rights and Democracy Act into law.

The act orders an annual review to check if Hong Kong has enough autonomy to justify special trading status with the US.

President Trump is currently seeking a deal with China in order to end a trade war.