critical. this is the third time in history it's been this high and what that means is the police will be -- the military rally will be on the streets of the u.k. 5,000 soldiers we will be staying here because the authorities believe that there is an imminent possibility of an attack. what we know is that at 10:30 on monday night just at this concert was ending and the people and the children were screaming out on the streets, the attacker blew up his suicide device. it was a calculated move aimed at killing as many people and as many young children as possible. isis has now claimed responsibility for the attack. there are differing reports within isa social media. some suggesting that he was inspired by isis. other saying that he was directed by isis. there's a clear difference there. we know a little bit about the attacker himself. his name is salman abedi. he was born in manchester but it comes from libyan parents. his parents were refugees from libya. forensic teams have been