[JURIST] Speaking [transcript] outside 10 Downing Street Thursday morning, UK Home Secretary Charles Clarke has reported "terrible injuries" after several explosions on the London transport system just before 9 AM London time Thursday morning suspected to have been caused by terrorist bombs. The system was shut down after explosions at several stations; at least one double-decker bus is reported to have been destroyed with many casualties. Although some London-based websites are down, summary reports are provided by the BBC and the Guardian, with latest updates on the BBC and the Guardian news blog.

From the Guardian blog at 11:20 AM London local time (6:20 AM ET):

Tony Blair will be making a live, televised statement on the crisis at midday. Sir Ian Blair, Metropolitan Police Commissioner, has told the BBC that there have been six explosions so far today, one on a bus. In what is clearly intended to be a calming message, he asks that Londoners stay where they are, do not call the emergency services unless there is a life-threatening situation, and promises there will be more information.

• UK government emergency page
  
• London Metropolitan Police news page
• London Transport news
• 10 Downing Street
• UK Home Office
• UK Resilience
• Mayor of London
• London Prepared
• London Strategic Emergency Plan
• Royal London Hospital