China to Curb Dissidents In Shanghai During Games.

In the latest sign of efforts to prevent dissent during the Beijing Olympics, political activists in Shanghai say they have been warned against expressing their opinions, speaking with foreigners or visiting Beijing until after the Games. The activists, who have petitioned the city government over grievances in the past, say they were summoned by the police, or detained and issued warnings against making political statements before or during the Games. [ABSTRACT FROM PUBLISHER]