Oh hell. CNN: London rocked by explosions. CNN says that it now appears that three explosions went off in the Tube, and another ripped through a double-decker bus as it was approaching Russell Square.

Lisa and I stayed in Russell Square during our first stay in London in 1999. We felt it was one of the most peaceful places in that busy city. Sadly, not anymore.

Update: Jeff Jarvis has a growing list of links and first hand reports from London bloggers.