The wife of one of five missing Hong Kong booksellers said she met with her husband in China, according to a statement released by the Hong Kong police on Sunday amid growing diplomatic pressure on Chinese authorities to clarify the fate of the men.

Lee Bo, 65, an owner of a publisher and bookshop specializing in books critical of China's Communist Party leaders, vanished in late December amid widespread speculation that Chinese authorities may have abducted him in the financial hub and spirited him across to China for an investigation.

Lee, who has dual Hong Kong and British citizenship, surfaced on Saturday, meeting wife at a guesthouse in mainland China, the Hong Kong police said in a statement issued after midnight Sunday.