Police in China’s capital said Aug. 28 they will start patrolling the Web using animated beat officers that pop up on a user’s browser and walk, bike or drive across the screen warning them to stay away from illegal Internet content.

Starting Sept. 1, the cartoon alerts will appear every half hour on 13 of China’s top portals, including Sohu and Sina, and by the end of the year will appear on all Web sites registered with Beijing servers, the Beijing Public Security Ministry said in a statement.