Baku, May 23, AZERTAC
Twenty-two people, including children, have been killed and 59 injured in a suspected suicide attack at Manchester Arena.
The blast happened at 22:35 BST on Monday at the end of a pop concert by the US singer Ariana Grande.
According to BBC, greater Manchester Police said the lone male attacker, who died in the blast, was carrying an improvised explosive device which he detonated.
Relatives are using social media to hunt for missing loved ones.
Chief Constable Ian Hopkins said it was "the most horrific incident" the city had ever faced.
He said the "fast-moving investigation" was now working to establish whether the attacker "was acting alone or as part of a network".
Home Secretary Amber Rudd said it was "a barbaric attack, deliberately targeting some of the most vulnerable".
The prime minister is to chair a meeting of the government's emergency Cobra committee at around 09:00.