The Null Device
According to the Wikipedia entry on the terrorist attacks, there was also a bombing in South Kensington, and a suicide bomber was shot dead in Canary Wharf.
Some group claiming to be al-Qaeda has claimed responsibility for the attacks. Which could well be true; initially it didn't look quite spectacular enough to be them, though it could well be a group of radical Islamist copycats; a franchise operation, as it were. Or a feint to draw out the emergency response services and analyse their plans in preparation for a later, more devastating, attack. It's probably not the IRA, anti-globalisation groups, animal-rights militants or anyone else.
Then again, after such an attack, nutters usually come out of the woodwork to claim responsibility and get some free publicity. The militant Islamist group who claimed responsibility may or may not be connected to whoever actually carried out the attacks.
One thing that seems striking about the incidents is the apparent lack of panic. Commentators are talking about the people's stoical resolve, hardened by IRA bobings past, and the spirit of the Blitz. As such, if the aim was to terrorise the public, it doesn't seem to have worked.
It's official: it's a terrorist attack, or so Blair has said anyway.
Bombs go off all over London, at Tube stations and on a bus, at 8:50am. The Tube and bus services have been suspended. Details are still vague, though there are reportedly many seriously injured people. Initial reports said that it was a
very severe signal failure power surge, though now it's looking like a terrorist attack.
Update: there are rumours that 20 people are dead and >90 injured, though the BBC hasn't confirmed them.