Four people have been detained in connection with a sex video allegedly filmed in a Uniqlo clothing store fitting room in Beijing’s upscale Sanlitun area, police said in a statement late Sunday. Among the arrested is the couple who appeared in the video, which went viral since it was uploaded online last week.

According to the statement, the four were detained on suspicion of spreading obscene content, the Associated Press reported. The police were interrogating the couple who confessed to sharing the video with a friend through a mobile chatting app. The video, captured in April, reportedly surfaced on Sina Weibo, China’s version of the microblogging site Twitter.

Police are also reportedly investigating a 19-year-old man suspected of uploading the footage online. Moreover, they are looking into the case with a possible angle of publicity stunt by the popular Japanese retailer. But, Uniqlo has denied the accusation, according to reports.

The Cyberspace Administration of China, country’s online watchdog, said that the video was "against socialist core values" and asked online operators to assist the police, BBC reported.

According to Chinese law, those found guilty of circulating obscene books, films, pictures and video clips could face up to two years of imprisonment, the official Xinhua News Agency reported, adding that people who make obscene products could be jailed for life.