A 22-year-old man arrested on suspicion of the murder of Lee Rigby has been discharged from hospital and taken into custody at a south London police station.
Police confirmed that on arrival at the police station he was also arrested on the suspicion of the attempted murder of a police officer.
He remains in custody and will be interviewed by detectives from the Metropolitan Police Service Counter Terrorism Command.
ITV News has uncovered a video showing Woolwich suspect Michael Adebolajo speaking at a demonstration at Harrow Central Mosque in 2009.
Documents suggest Security Services were trying to recruit Woolwich suspect Michael Adebolajo and had also approached members of his family.
Police in Kenya say they did everything they could to highlight their concerns about Michael Adebolajo.