A Chinese student was found guilty by a London court on Wednesday of drugging and raping 10 women in Britain and China, with British detectives saying they suspected that as many as 50 other women might have been attacked by him.

Zou Zhenhao raped three of the women in London and seven in China, and police warn there could be over 50 other victims.

A Chinese PhD student has been convicted of raping unconscious women after drugging them and filming the attacks. Zhenhao Zou, 27, who studied at University College London, is believed to be one of Britain's worst ever sex offenders.

A “persistent sexual predator” has been found guilty of drugging and raping 10 women before covertly filming them in a string of sex attacks. Zhenhao Zou, 27, had presented himself as a “smart and charming young man”,

Zhenhao Zou, 28, who was doing his PhD at University College London, raped three of the women in London, and seven in China.