Twenty-two people have been killed and 59 injured in a suicide bombing at Manchester Arena at the end of a concert by US singer Ariana Grande.
Armed police have arrested a 23-year-old man in Chorlton, south Manchester, in connection with the attack.
A lone attacker set off a homemade bomb in the foyer on Monday evening in what PM, UK Theresa May called an “appalling, sickening” terrorist act.
The first victim has been named as 18-year-old student Georgina Callander.
It is the worst terrorist attack in the UK since the 7 July bombings in 2005 in which 52 people were killed.