The man who carried out a terrorist attack in Manchester last night has been named as Salman Abedi, according to US officials.
A number of US media outlets have reported that US officials said British authorities were aware of the identity of the attacker.
An explosion at an Ariana Grande concert at the Manchester Arena killed 22 people, including children, and left dozens injured. The youngest victim has been named as eight-year-old Saffie Rose Roussos. The attacker died while detonating an improvised explosive device.
Manchester police this morning arrested a 23-year-old man in the south of the city in connection with the attack.
The police also carried out a controlled explosion in the Fallowfield area, also in connection with the investigation into the bombing.
Prime Minister Theresa May today condemned the attack as representing "appalling, sickening cowardice – deliberately targeting innocent, defenceless children and young people who should have been enjoying one of the most memorable nights of their lives".
"We struggle to comprehend the warped and twisted mind that sees a room packed with young children not as a scene to cherish, but as an opportunity for carnage," May added.
"But we can continue to resolve to thwart such attacks in future, to take on and defeat the ideology that often fuels this violence, and if there turn out to be others responsible for this attack, to seek them out and bring them to justice."