Updated

The wife of one of China's most prominent human rights campaigners says he has disappeared during a trip to visit relatives of a detained rights lawyer.

Jin Bianling said Thursday that her husband Jiang Tianyong, a legal activist, has not been heard from since Monday, when he was due to board a train to return to Beijing.

Jiang's defense work involved some of China's most politically sensitive figures in recent years, including the dissident lawyer Gao Zhisheng and blind activist Chen Guangcheng.

Jiang was disbarred in 2009 but has continued his activism, recently helping to publicize the plight of nearly two dozen lawyers arrested as part of a sweeping 2015 government crackdown.

He could not be reached on Thursday by his mobile phone, which was turned off.