The IPCC said the three arrested were a 50-year-old sergeant who was arrested at work, a 29-year-old Pc arrested at an address in south London and a retired PC aged 48 who was arrested by appointment at a central London police station.
Sean Rigg died from a cardiac arrest at Brixton police station in August 2008 and the inquest jury found that police officers used "unsuitable" force after arresting the 40-year-old schizophrenic for attacking passers-by and police officers in Balham, south London.
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Stephen Fry has quit Instagram, telling fans he has been "hounded off" the social media site.
The Office star Martin Freeman has given his backing to Labour in the party's first party election broadcast in England.
Today's weather will remain unsettled, with some cold, wet and windy conditions.