New media have become the top channel for exposing corruption cases, doubling the number revealed in traditional media, an annual report shows.

From 2010 to 2012, 156 corruption cases were exposed by websites and mobile Internet platforms - twice the number exposed by newspapers, radio and television, according to the 2013 Annual Report on the Development of New Media in China released in Beijing on Tuesday.

The report was written by the Chinese Academy of Social Sciences, a government think tank.