China released a prominent human rights lawyer on bail amid protests Monday outside a northern city court, where supporters of other jailed lawyers and activists condemned the secrecy surrounding the government's yearlong campaign against legal activism.

The release of Wang Yu, who was detained last July, coincided with videos of an alleged confession by Wang posted on the websites of two Hong Kong media outlets in which she renounced her legal work and said "foreign forces" were using her law firm to undermine and discredit the Chinese government.

Wang's Beijing-based firm, Fengrui, has been at the center of a vast case in which dozens of lawyers and activists have been detained, questioned or charged with subversion since July last year.

Wen Donghai, a lawyer for Wang, told The Associated Press on Monday that he had learned from media reports that Wang had been released but had not seen her. Li Yuhan, another lawyer representing Wang, said Wang's mother did not know of her release.