RadioOfficer writes: "Recent events in China have clearly raised concerns among the Chinese authorities. Yesterday evening shortly before 8pm, access to Facebook was blocked in Shanghai and Google search was severely curtailed. While Twitter and youTube have been inaccessible in mainland China for some time now, Facebook had escaped a general blockade albeit suffering occasional brief interruptions. The events of yesterday evening have Shanghai residents and ex-pats concerned however, with many wondering if Facebook has now suffered the same fate as Twitter and youTube. Many fear Facebook will not return anytime soon... The Washington Post appears to be the first official news outlet to confirm the actions of the Chinese authorities."