The Hong Kong government condemned on Friday an attack by a "violent mob" on the city's justice secretary in London, the first direct altercation between demonstrators and a government minister during months of often violent protests.

Secretary for Justice Teresa Cheng, who was in London to promote Hong Kong as a dispute resolution and deal-making hub, was targeted by a group of protesters who shouted "murderer" and "shameful."

A statement by the Hong Kong government said Cheng suffered "serious bodily harm" but gave no details. Video footage of the incident showed Cheng falling to the ground.