Manchester Arena explosion: 22 killed in terror attack (VIDEO)

At least 22 concert-goers were killed last night and 59 injured after a lone suicide bomber targeted Manchester Arena at the end of a concert by the American singer Ariana Grande.

Witnesses described hearing a huge bang shortly after 10.30pm at the entrance to the Arena as thousands of people made their way out of the concert.

Some witnesses described seeing smoke and smelling burning in the foyer area of the Manchester Arena, others said they had seen nails on the floor, the Telegraph reported.

Theresa May, the Prime Minister, suspended her General Election campaign in the wake of the apparent terror attack and there will be an emergency Cobra meeting at 9am this morning.

The Metropolitan police announced that there would be more officers on the streets of the capital following the Manchester blast.

Twenty two people were killed and 59 people were injured in the Manchester Arena attack on Monday night, Greater Manchester Police chief constable Ian Hopkins said. Hopkins said the lone male attacker, who died in the blast, was carrying an improvised explosive device which he detonated.