Police in Beijing said they had arrested a woman for posting defamatory comments about athletes and coaches online following the women’s table tennis singles final at the Paris Olympics.

The 29-year-old woman surnamed He “maliciously fabricated information and openly slandered others,” the public security bureau of Beijing’s Daxing District said in a statement on the X-like platform Weibo on Tuesday.

The statement did not mention which athletes and coaches were affected and the case remains under investigation, police said.

The arrest took place following the women’s table tennis singles final in Paris on Sunday, police said.

In this game, Chen Meng won gold in an all-Chinese match against Sun Yingsha.

While Sun received enthusiastic applause from the spectators during the match, Chen had to endure boos from the audience and insults on the Internet.

The Chinese Ministry of Public Security referred to the game and announced on Wednesday that it would “crack down on chaotic, sports-related fan groups.”

The ministry’s statement, reported by state media, urged fans to “watch the game in a civilized manner, discuss it objectively and respect coaches, athletes and referees.”

Weibo said in a statement on Sunday that the company had deleted over 12,000 posts and blocked over 300 accounts following the incident.

Users were asked to “continue to focus on the court and comment rationally.”

Among the deleted posts were attacks on Chen, according to the report by the website Freeweibo, which monitors comments removed from the platform.

“The whole country was hoping that Sun Yingsha would win gold in the women’s singles. Where is your sense of justice?” one said of Chen.

Some posts showing a Sun fan in Paris apparently giving Chen the middle finger were also removed.

The trending hashtag “Don’t let fan culture undermine Chinese table tennis” had been viewed more than 200 million times on Weibo by Sunday.

Many other users criticized the fans in the stadium and expressed their support for Chen.

“Anyone uninformed would have thought that Yingsha would be playing against a foreign opponent,” said one commentator.

Weibo said it had deleted 8,200 comments and blocked more than 500 accounts ahead of the Games for “insulting and defamatory” comments about athletes, and urged users to cheer on everyone competing for China in Paris.

China is the undisputed superpower in table tennis and dominated in Paris.