Michael Adebolajo, one of two men suspected of murdering a British Army soldier in London this week, was asked to work for the United Kingdom's MI5 Security Service, a friend told the BBC before being arrested at the BBC studios.
Abu Nusaybah told the BBC that Adebolajo turned down the request. He also claimed that Adebolajo was detained, tortured, and sexually assaulted by security forces in Kenya last year. Neither allegation has been substantiated.
Nusaybah said that Adebolajo had been psychologically troubled after the events in Kenya, and that he had been continually harassed by MI5 agents once back in London.
London's Metropolitan Police Service confirmed that Nusaybah was arrested after the interview, and search warrants were executed at two locations in east London. He is being held at a south London police station on suspicion of the commission, preparation or instigation of acts of terrorism.
Adebolajo, 28, and Michael Oluwatobi Adebowale, 22, are being held in connected with the soldier's death on Wednesday. Both are British of Nigerian Christian descent, and both converted to Islam. They were shot in an altercation with police after the killing of 25-year-old Lee Rigby, a drummer (or private) in the 2nd Battalion of the Royal Regiment of Fusiliers. Rigby, from Middleton, Greater Manchester, had served in Cyprus, Germany, and Afghanistan, before becoming a recruiter and assisting with duties in the Tower of London.
Rigby was run down by a car, then hacked to death by two men with knives and a cleaver. Rigby's body was dragged on to the road by the two attackers, who remained at the scene until police arrived and shot them. The assailants told witnesses they had killed Rigby to avenge the killing of Muslims by the British military; the confession was captured on cell phone video.