Disney's live-action reimagining of Mulan is facing calls for a boycott after its star reportedly voiced support for police in Hong Kong.

Crystal Liu, also known as Liu Yifei, reportedly posted a message on China's Twitter-like social media service Weibo which translates as: "I support the Hong Kong police. You can all stack me now. What a shame for Hong Kong."

The post comes amid heightened tensions in the former British colony, where pro-democracy demonstrators clashed with local police in protests originally sparked by controversial extradition proposals.

It provoked fierce criticism in the west and the hashtag #BoycottMulan began trending online.

Critics accused Liu, now a US citizen, of supporting police brutality and denying Hong Kong citizens the rights she enjoys in her adopted country.

She is not the only star who has been criticised for their stance on the protests.