How safe are you in London? Man shot dead by police on Tube] A man has been shot dead by armed officers at Stockwell Tube station, as police hunt four would-be bombers. Passenger Mark Whitby told BBC News he had seen a man of Asian appearance shot five times by "plain-clothes police officers" with a handgun. "I saw the gun being fired five times into the guy - he is dead," he said. Passengers were evacuated from the Northern Line station in south London. The incident followed four minor explosions in the capital on Thursday. (Four Bomb on Thrusday are (On Train) Warren Street, Oval stations, Shepherd's Bush and (Bus: No 26) SHOREDITCH) Please read this alert: http://news.bbc.co.uk/1/hi/uk/4703853.stm