From the BBC News website;
Large numbers of casualties have been reported after at least six explosions on the Underground network and a double-decker bus in London.
Scotland Yard confirmed one of several reports of explosions on buses in the city - in Tavistock Place - but said the cause was not yet known.
UK Home Secretary Charles Clarke said several explosions in central London had caused "terrible injuries".
All Tube services and bus services in central London have been suspended.
"The health services are in support to deal with the terrible injuries that there have been," Clarke told reporters outside Downing Street.
Metropolitan Police Commissioner Sir Ian Blair said there had been at least six explosions, but said the picture was still "very confused".
Scotland Yard said explosions have been reported at Edgware Road, King's Cross, Liverpool Street, Russell Square, Aldgate East and Moorgate.
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