The United States on Thursday offered to help Britain investigate the deadly explosions in London that killed some 40 people and injured hundreds.
"We have offered to help (the British) in any way that we can on intelligence matters, law enforcement matters," US Secretary of State Condoleezza Rice said in an interview with the BBC, adding that she spoke with British Foreign Secretary Jack Straw to make that offer.
"Of course it may take some time to untangle this. But whoever did this, it is a part of clearly a concerted campaign to try and terrorize innocent people and it is certainly not going to succeed, " she said.
Earlier Thursday, Rice issued a statement in which she strongly condemned the explosions in London and expressed condolences to the victims of the explosions.
Britain has been the strongest ally of the United States in the Iraq war.