Sky is now reporting that all four bombers who attacked trains and a bus in London on Thursday died in the attacks, and that all four were British citizens. (This also implies that we now know there were 4 of them).
The Times has this in its article:
And a 21-year-old local man, speaking at the scene near Colwyn Road, claimed that a group of his friends who are all young British-born Pakistani men in their early twenties had already been arrested today.
The man, who did not wish to give his name, said: ?They?re all normal lads, very, very top lads they are. Police are just doing this for no reason. They don?t know what they are doing at the end of the day. This is a load of nonsense.?
It looks as if Metropolitan Police Chief John Stevens speculation might have been reasonably accurate, at least as far as the actual people who placed the bombs is concerned. Of course even if all this is confirmed there are still very many outsanding question, in particular about the origins of those military grade explosives and the operational logistics planning.