subway car. some 29 people were injured. most of the injuries are described as minor. more than a dozen hospitalized today. we understand that none of those inju injuries are serious or life-threatening. tonight isis is claiming responsibility for this attack, but law enforcement here in the uk like to emphasize that the terror group often does this after an attack like this showing no evidence of a direct link. and so far they have found no evidence that isis was somehow directing this particular attempt. also tonight on a final note, steve, the threat level here has been raised to critical. that's the highest level in the uk. it means an attack may be eminent, but authorities here like to stress as well that it also means more officers will be freed up to work on this investigation, to work on the manhunt. >> all right. nbc's kelly cobiella thank you