Greater Manchester Police have arrested a man in connection with last night's deadly terrorist attack at the conclusion of an Ariana Grande concert that has left 22 people dead and injured at least sixty others.

In a statement released shortly after news of the arrest, Islamic State terrorists, known as ISIS, claimed responsibility for the attack that took place at the Manchester Arena, around 160 miles northwest of London, at 10:33 pm local time, vowing that "what comes next will be more severe".

The unprecedented attack, which appeared to deliberately target young children, has shocked a nation that has to some extend become inured to terrorists incidents going back to the 1970s and the height of the conflict in Northern Ireland - resulting in rare public statements from both Queen Elizabeth II and the head of the country's domestic intelligence services, known as MI5

"Everyone at MI5 is revolted by the disgusting terrorist attack in Manchester last night. Our hearts go out to the families of the victims, the injured and everyone affected by it," said Director General Andrew Parker. "Our teams have been working with the police through the night to assist the investigation. We remain relentlessly focused, in numerous current operations, on doing all we can to combat the scourge of terrorism and keep the country safe."