On March 5, 2008, Falun Gong’s official website Minghui published a list of over 50 Falun Gong practitioners in Beijing who were arrested since December 2007. According to the report, the police began monitoring and following them as early as August 2007 in an attempt to limit efforts to expose the persecution of Falun Gong in the run-up to the Olympics.
Source: Minghui, March 5, 2008
http://minghui.ca/mh/articles/2008/3/5/173643.html