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Liu Qiangdong, the chief executive of Chinese e-commerce company JD.com, will not face sexual assault charges after his arrest in the US in September.

Prosecutors said they had not found enough evidence to charge Mr Liu after he was accused of raping a Chinese student at the University of Minnesota.

He denied wrongdoing and was released less than a day later to return to China.

JD.com is one of China's largest e-commerce sites.

"As is the case in many sexual assault incidents, it was a complicated situation," .

The county said there were "profound evidentiary problems" which would have made proving the allegations in court "highly unlikely".

Mr Liu, 45, was taking courses at the university's Carlson School of Management when the allegations were made.

He and a group of friends went to a meal on 30 August which the young woman also attended.

Police were called to a friend of the woman's early on 31 August, and Mr Liu was arrested the following day.

Evidence from body cameras worn by the officers, however, "do not support criminal charges in this case," the statement said.

"It had nothing to do with Liu's status as a wealthy, foreign businessman," it added.

According to Forbes, .

His arrest caused shock in China, where people speculated on social media that Mr Liu had been set up.

The company has faced recent troubles, announcing in November that .

Its shares hit an 18-month low the week after his arrest.