At least two people have been killed and scores injured after three blasts on the Underground network and another on a double-decker bus in London.
Home Secretary Charles Clarke said blasts occurred between Aldgate East and Liverpool Street tube stations; between Russell Square and King's Cross tube stations; at Edgware Road tube station; and on a bus at Tavistock Square.
Explosions rock London underground and buses
Attacks at a Glance
Statement claiming London attacks Previously unheard of al-Qaeda group claims responsibility.
Americans: If you have people in London that you want to find, AND people elsewhere, drop an email to your person elsewhere to turn their TV to Sky News, they're running a ticker of messages from people announcing they're OK, and those seeking loved ones.
Also, the Guardian is running a blog Bomb blasts plunge London into chaos. Please note that the numbers on Sky News 45 minutes ago were about 150 people injured, while the Guardian is speculating as many as a thousand. If there are people trapped in the Underground, it will take time to get to them and ascertain their injuries, if any.