Hong Kong’s justice secretary has been seriously hurt as she was “attacked” by protesters in London, the Chinese embassy said.
Protesters were involved in an altercation with Teresa Cheng during her visit to the capital on Thursday evening.
Dramatic footage of the incident showed the minister on the ground as she was surrounded by demonstrators.
She was pushed by activists who were following her and shouting, the Chinese Embassy said.
Hong Kong leader Carrie Lam called the incident "barbaric". She said the "attack" violated the principles of a civilised society.
In statement, the Hong Kong’s government said: "The secretary denounces all forms of violence and radicalism depriving others' legitimate rights in the pretext of pursuing their political ideals, which would never be in the interest of Hong Kong and any civilised society.”
Cheng was in the city to promote Hong Kong as a dispute resolution and deal-making hub.
The Chinese embassy said: "We express strong indignation and unequivocally condemn the activists," the embassy said in a statement. "Now, they are taking such violence abroad and into the U.K."
Hong Kong has been gripped by unrest for months, but Chief Executive Lam remains in place with the backing of Xi Jinping's Chinese regime.
The tensions between protesters and police have been rising for weeks, with more than 3,000 people arrested since June.
A 70-year-old man has died after being struck on the head during clashes between government supporters and protesters in the region on Thursday.
Students and other protesters have taken over major campuses in, building barricades and stockpiling gasoline bombs and other weapons.
A masked protester at Chinese University announced in a 3am statement to assembled media that the group would clear the road for 24 hours.