Police killer Harry Roberts has been released from prison, despite calls from relatives of his victims, politicians and senior police for him to stay behind bars.

A man suspected of killing two unemployment office workers and critically injuring a third has been arrested following a manhunt that lasted seven hours and kept a town on edge.

Downing St last night resisted calls for an inquiry into chief whip Andrew Mitchell, after the cabinet minister apologised publicly to police officers for subjecting them to a tirade of verbal abuse.