A pop singer who was drafted in to promote a children's charity has been arrested in connection with allegations of sex assaults on boys, it was reported yesterday. Wang Liyong, known to his fans as Hong Dou or 'red bean', was detained by police in Beijing's Chaoyang district, an official with the Chaoyang Public Security Bureau said. His arrest was related to reports of assaults on boys, said to have taken place mostly at a dancing school, according to the Beijing-based Jinghua Times. Families of the alleged victims have complained to police and investigations were continuing, the paper added. The report of his arrest comes two months after Wang, in his twenties, was invited to promote a children's welfare charity programme run by the semi-official Chinese Children's Foundation. In 1995, Wang won a Hong Kong music industry award run by TVB for best new singer from the mainland and has had more recent success as an actor. Wang's manager, Yan Lin, refused to comment on the report, saying she had not been in touch with him recently.