8th UPDATE: 9:46 p.m. U.S. EDT: UK prime minister Theresa May has spoken about the likely terror attack. The Independent notes
Theresa May has suspended all election campaigning in the wake of the Manchester explosion.
7th UPDATE: 9:40 p.m. U.S. EDT:
6th UPDATE: 9:05 p.m. U.S. EDT: This tweet from David Leavitt’s Twitter:
5th UPDATE: 8:56 p.m. U.S. EDT: On the off chance that someone in the area comes across this page:
4th UPDATE: 8:48 p.m. U.S. EDT: 2nd device was NOT one. From Greater Manchester Police Twitter:
3rd UPDATE: 8:44 p.m. U.S. EDT:
2nd UPDATE: 8:39 p.m. U.S. EDT: Newsweek adds that police have found a second device, which they destroyed.
1st UPDATE: 8:33 p.m. U.S. EDT: The Manchester Evening News has a live blog with video from the arena.
ORIGINAL POST: The Financial Times has some of the details.
Armed officers sealed off the streets around the Manchester Arena, the largest indoor concert hall in Britain, as a stream of ambulance and police cars arrived after a performance by US singer Ariana Grande. She was unhurt, according to her manager. British Transport police said that the explosion happened in the foyer near the ticket office. Witnesses said it happened as people left at about 10.40pm, but there was no information on what may have triggered them.