I happened to be awake when the bombing occured, which was approximately around 4am EST (9am London Time) this morning.  I think this is a good time to break my vacation.

Drudge is on the case, as he has posted that Scotland Yard received the threat, and informed Israel of it.  At first it was thought to be a power surge, but officials in London have comfirmed that explosions came from the buses themselves, not from their vicinities, which all but guarantees bombs. 

Sky News, Rupert Murdoch's network, has reported as many as 20 people are dead and 90 injured.  BBC World News has stated that their employees have confirmed as many as five.  The transportation system has been shut down, and oil prices are dropping like a rock.

Tony Blair and London officials are expected to have a press conference in the next 10 minutes.  I will liveblog it the whole way.

7:08:  Blair's speaking.  He said it's "reasonably clear" that these were terrorist attacks.  He plans to leave the G8 to find out the extent of the damage and help coordinate the cleanup and investigation efforts and return to Denmark this evening.  The meeting will continue in his absence.  He calls the terrorism "barbaric" and he believes it was designed to target the opening of the G8 meeting.  Blair did seem kind of shaken at the time.

Video is starting to come in.  I'm watching NBC, and people that have been seriously bandaged up are being helped out of the area.  This isn't pretty.

7:16:  There are people still trapped in the damaged trains.  I don't know if all of the people have been moved from the subway; I'm trying to get confirmation that the subway has been completely cleared.

On NBC, Couric is asking whether Al Qaeda #2 Ayman Al-Zawahiri was referring to this in his last message a few weeks ago.  It is possible.  Drudge is still reporting on the Scotland Yard/Israel story, but there has been no confirmation, link, or any kind of elaboration on his part.

7:30:  Instapundit's awake, and he's got a ton of news.  First, KJ Lopez of NRO's The Corner was awake this morning as well....doh!  That woman never sleeps.  There has been a message on a terrorist website that has been decoded and seems to take responsibility for the attacks, however they're not sure whether it's genuine.

7:40: There's also a UK blogs aggregator, which can give you a number of first-hand accounts of what's going on in the country.

To confirm:  There have been six explosions:  five of them were underground in the subway, and only ONE was on the bus.  My initial report was as many as three buses had been destroyed, but they've confirmed only one.

7:42:  Just as I posted this, Andrew Stuttaford of NRO is getting an email from a friend that as many as three buses could have been bombed.  Edgeware Road in London has been closed off, and it is pandemonium in that area.

7:50:  Let me say this:  more than likely this wasn't in response to the London Olympics.  First, as Couric has said on NBC (and I have to give her props; she's done a helluva job this morning), terrorists have gone after the London subways in the past, and London police broke up a terrorist clique last month that targeted the subways.  Second, this is too coordinated to be planned and executed less than 24 hours after the announcement.  Third, why in the world would someone target the Olympic site six years prior to the actual event?  Makes no sense.

These terrorists were simply in the right place at the right time.  Or, the wrong place at the wrong time, depending on how you look at it.

7:55:  Two things have been confirmed.  First, Drudge's assertion that Israeli officials were contacted by Scotland Yard were repeated by the Associated Press.  As such, former Israeli PR Benjamin Netanyahu has decided against going to an economic conference, which happened to be where one of the buses exploded.

Hold on...one of the Security ministers spoke before the House of Commons.  He is Charles Clarke.  He confirms only four attacks, and he encouraged people to go to their homes and not travel.

The other thing that has been confirmed is the message on a islamic website celebrating the attacks.  Still no word on the actual persons behind it, though.