One of five leading Chinese feminist advocates says she went through lengthy and verbally abusive interrogations after she was conditionally released in a case that has attracted international attention.

Wu Rongrong, a 30-year-old advocate for women's rights, says in a statement released Saturday that she endured an eight-hour police interrogation in a hotel room in the eastern city of Hangzhou. She says her interrogators insulted her at length, calling her selfish and ungrateful.

Wu is banned from speaking to the media, but her lawyer Lu Zhoubin confirmed the statement's authenticity.

Wu and the others were detained last month as they were planning to hand out stickers against sexual harassment. They were released after 37 days but remain criminal suspects.

Police did not immediately respond to a request for comment.