LONDON  Three people have been arrested in East of England on suspicion of spying on behalf of Russia, police said on Thursday. In a statement, the Metropolitan Police said the suspects, a 41-year-old man, and a 35-year-old woman were arrested at an address in Grays, Essex. The third suspect, a 46-year-old man, was arrested at a separate address, also in the Grays area of Essex as part of Counter Terrorism Policing investigation into suspected National Security Act offences, which is being led