At least 22 people have died and 50 more were injured after a terrorist bombing tore through an Ariana Grande concert in Manchester, police have said.
Chief Constable Ian Hopkins said the sole attacker died in the explosion.
Mr Hopkins said the lone male attacker, who died in the blast, was carrying an improvised explosive device which he detonated.
He said there are children among the people killed in the attack.
Mr Hopkins said: “This has been the most horrific incident we have had to face in Greater Manchester and one that we all hoped we would never see.
“Families and many young people were out to enjoy a concert at the Manchester Arena and have lost their lives.
“Our thoughts are with those 22 victims that we now know have died, the 59 people who have been injured and their loved ones.
“We continue to do all we can to support them.”
Mr Hopkins said a “fast-moving investigation” had established the attack was conducted by one man, although detectives are working to establish if he was “was acting alone or as part of a network”.
“The attacker, I can confirm, died at the arena.
“We believe the attacker was carrying an improvised explosive device which he detonated, causing this atrocity.”