Teresa Cheng Yeuk-wah, the secretary for justice of the Hong Kong Special Administrative Region (HKSAR) government, was attacked by multiple protesters on Thursday during an official trip to London.
She later made a report to the London police and asked them to "take the case seriously and put the culprits to justice," her office said in a statement.
"The Secretary for Justice castigates the violent mob in London today, causing her serious bodily harm on her way to an event venue," the statement 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 civilized society," the statement said.