LONDON (Reuters) -A Chinese national said by London police to be one of the most prolific sex offenders they had ever investigated was jailed for life after admitting to a series of rapes, sex attacks and voyeurism on six women.

Police said Chao Xu, 33, used his position within university and professional networks to target women, gaining their trust before drugging and raping some victims. Detectives said they believed hundreds more could be victims of his voyeurism both in Britain and China.

“Chao Xu is among the most dangerous and prolific sexual offenders we have ever encountered,” said Detective Superintendent Lewis Sanderson. “His crimes were calculated, sustained, and devastating, spanning years and leaving unimaginable harm in their wake.”

His offences came to light after he att

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