MINNEAPOLIS/SHANGHAI (Reuters) - The CEO of Chinese online retail giant JD.com Inc, Richard Liu, was arrested in Minneapolis last week following an allegation of rape, according to a public information report released by police on Tuesday.

Liu, who through his lawyers has denied any wrongdoing, was released from custody on Saturday without being charged or paying bail. He has returned to China, appearing at an event on Tuesday to sign an agreement with Shandong Ruyi, the owner of Swiss luxury shoe firm Bally.

The disclosure adds detail about the accusation after police said previously he had been arrested on suspicion of criminal sexual conduct. It is likely to increase the pressure on Liu and U.S.-listed JD.com, which saw its shares end down 6 percent on its first day of trade since the news of his arrest broke.

Minneapolis Police Department spokesman John Elder said on Tuesday that if there were any charges against Liu they would not be filed until completion of a criminal investigation that would not occur before Friday.

Lawyers for Liu have said they do not expect him to be charged. “There’s no credible complaint,” defense attorney Joseph Friedberg said on Tuesday.

The police report said domestic violence was not involved. Elder said the alleged attack reportedly occurred at 1 a.m. local time on Friday, and that Liu was taken into custody later that evening.

Elder declined to disclose whether any accuser was cooperating with police. “I wouldn’t address that. That goes to the investigation,” he said.

According to Minnesota law, the maximum penalty if found guilty of first degree sexual assault is 30 years and the minimum is 12 years.

Beijing-based lawyers said that if Liu was charged, there would be few legal channels to force him to return to the United States, but added that it was unlikely he would refuse given the potential negative impact on his business interests. China does not have an extradition treaty with the United States.

FILE PHOTO: Richard Liu, CEO and founder of China's e-commerce company JD.com, attends a France-Chinese forum on the applications of artificial intelligence at SOHO 3Q in Beijing, China January 9, 2018. REUTERS/Jason Lee/File Photo

They declined to be identified as they were not authorized to speak publicly on the matter.

Any prolonged absence by Liu could exacerbate risks for the company, given JD.com’s unusual rules that require Liu to be present at board meetings for the board to make decisions. It is not clear, however, if he has to be physically present or could participate by teleconference.

Liu owns over 15 percent of JD.com’s stock and controls nearly 80 percent of the company’s voting rights.

JD.com said on Wednesday it had no comment to make on the case.

Danny Law, Hong Kong-based analyst at brokerage Guotai Junan, said that if U.S. police charged Liu, the firm’s share price would fall further, but predicted there would not be a sharp crash because of an already steep fall so far this year.

JD.com’s shares, now valued at some $42 billion, have lost around 30 percent since the start of the year on weaker sales amid stiff competition from much bigger rival Alibaba Group Holding Ltd.

The company counts Walmart Inc, Alphabet Inc’s Google and China’s Tencent Holdings as investors.

“If this spirals as a media focus, negative attention could offset some of the positives associated with endorsement by Walmart and Google,” analyst Rob Sanderson of MKM Partners said.

“Negative publicity could also compromise JD.com’s ability to attract international brands to its marketplace, which has been a top focus of the CEO over the past two years or so,” Sanderson said.

The agreement with Shandong Ruyi is part of that effort. Liu talked about the fashion industry in a press release about the deal but did not address his arrest in the United States.

Liu lost a court battle in Australia in July to keep his name out of a sexual assault trial. Liu was not accused of any wrongdoing in that case, according to a court document.

The case involved a person who had been a guest at a party hosted by Liu at his home in Sydney in 2015 who accused another guest of sexually assaulting her at a hotel. The defendant was found guilty of seven offenses.