The Taiwan coast guard on Monday detained relatives of two mainland Chinese fishermen who went missing after the boat they were riding capsized off the Jinmen Islet on Saturday.
One fisherman on the boat, Ou Ruilong, was rescued on Sunday, while two others, Ou Zhiyang and Hu Guorong, remain missing.
Relatives conducted a search for the fishermen on Monday but were detained by the Taiwan Jinmen Coast Guard Corps for a lack of documentation.
The Jinmen Coast Guard has dispatched helicopters to search for the missing fishermen.