Metropolitan Police have arrested a tenth person in connection with the murder of soldier Lee Rigby in Woolwich last Wednesday.
A 50-year-old man was arrested on suspicion of conspiracy to murder under PACE (Police and Criminal Evidence Act).
He was arrested in Upper Wickham Lane, Welling. An address is also being searched in south east London.
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.