Beijing, Dec 25 (RIA Novosti) A Chinese man has been arrested on charges of bigamy after his two wives discovered each other on a social networking site, a media report said.

The Mexican national of Chinese origin, identified as Chang, was arrested last week after one of the wives added her husband's 'buddies', including the other spouse, to her contact list on Kaixin001, a Chinese version of Facebook, China Daily reported Wednesday.

The two women soon became friends.

The bigamy was exposed when they exchanged wedding photos, featuring the same groom.

It turned out that Chang married a woman from the eastern province of Zhejiang, in 2005. Later, while doing business in Mexico, he met a woman from Beijing, and also married her when he learned she was pregnant.

He managed to keep the two marriages secret by telling the wives he was doing business abroad and could not return home frequently. Upon his arrival in China, he usually split his time between the two homes in Zhejiang and Beijing.

The first woman sued her husband, and he was detained while secretly visiting his parents.