British police are arresting people in the middle of the night if they have made racist or anti-Muslim comments on Twitter following the murder of a soldier by two Muslims in Woolwich, London.
Three men have so far been taken into custody for using Twitter and Facebook to criticize Muslims.
In the Woolwich attack, Lee Rigby, a drummer in the Royal Regiment of Fusliers, was run down in a car and then hacked and stabbed to death by two men with knives and a cleaver. They told a man video recording the scene that it was vengeance for the killings of Muslims by the British Army.
One man has been charged with "malicious communications" on Facebook, the Daily Mail reports.