Another Chongqing official has become the latest in a series of mainland cadres to become embroiled in a sex scandal. Authorities in the municipality's Peiling district issued a brief statement on their official microblog account yesterday morning saying an investigation would be conducted into Wu Hong, who works for the district's Urban Administrative and Law Enforcement Bureau, after pictures appeared online on Sunday showing him with a half-naked young woman in a hotel room. The exposé came a week after a whistle-blower released a sex-video clip of a district-level party boss in the municipality and said there were similar videos featuring at least five other senior Chongqing party cadres. It was unclear if Wu was one of the five. In the latest pictures, Wu is seen wearing his official uniform. Authorities announced the investigation two days after the anonymous post on popular web portal Tianya.cn and the party's disciplinary inspection authorities confirming the man was Wu. Keeping mistresses is common among mainland officials, despite a party ban. Their decadent lifestyles have come under increased scrutiny in recent months, amid a series of crackdowns and online revelations. Late last month, Lei Zhengfu, 54, party chief of Chongqing's Beibei district, was reportedly removed from his position amid bribery allegations - just three days after a video surfaced online appearing to show him having sex with an 18-year-old. In the anonymous post that accompanied the pictures of Wu, the whistle-blower claimed to have kept the pictures for two years and decided to release them after hearing about the Lei sex scandal. On Monday, authorities in Shuangcheng , Heilongjiang province, sacked a local People's Congress deputy after a female journalist accused him of rape and blackmail. In another recent case, in Hengyang, Hunan province, disciplinary authorities said they had disproved allegations against the county's deputy chief, Wang Peng, who was appointed chairman of the Standing Committee of the People's Congress of Hengyang on Friday. Dai Mingde , deputy director of the county's taxation bureau, had accused Wang of accepting bribes, keeping mistresses and having sex with prostitutes.