The pastor of an unauthorized Christian church in central China says that a pastor from Taiwan was detained for 15 days by Chinese police after visiting the underground congregation on the mainland.

Li Jia'en, who leads the church group in the central Chinese city of Luoyang, said Monday that Shen Zhenguo was detained on Oct. 13 and that he returned to Taiwan after being released by police on Oct. 29.

Li says he himself also was detained for the same length of time on the charge of holding an illegal religious gathering.

Luoyang police declined to confirm the case over the phone, and the local government propaganda official says he is unaware of the matter.

Congregations that refuse to pledge loyalty to China's ruling Communist Party are banned.