Manchester Arena Blast: 19 Dead and 50 Hurt
Nineteen people have been killed and about 50 injured in a suspected terror attack at Manchester Arena.
The blast happened at 22:35 BST on Monday following a pop concert by the US singer Ariana Grande.
PM Theresa May said her thoughts were with those affected by "what is being treated by the police as an appalling terrorist attack".
Paramedics at the scene told the BBC they had treated some of the wounded for "shrapnel-like injuries".
British Transport Police said the explosion was in the arena's foyer.
Greater Manchester Police has established an emergency telephone number in response to the attack. It is: 0161 856 9400.
The prime minister has suspended her general election campaigning and will chair a meeting of the government's emergency Cobra committee later, in response to the attack.
Mrs May said: "We are working to establish the full details" of what had happened in Manchester.
"All our thoughts are with the victims and the families of those who have been affected," Mrs May said.
BBC Home Affairs Correspondent Daniel Sandford said senior counter-terrorism officers were assembling in London and liaising with the Home Office.
Unconfirmed reports from two unnamed US officials suggested the attack was carried out by a suicide bomber.