In photos: Manchester attack kills 22, more than 50 injured

At least 22 people have been killed and 50 injured in a suspected terrorist bombing at Ariana Grande's concert in Manchester.

The Manchester Arena has a capacity of 21,000 and is one of the largest music venues in Europe. The attack took place in the foyer area at the end of the concert.

“One of the witnesses said that he could see nuts and bolts strewn on the floor of the foyer after the attack, which would suggest a nail bomb was involved”, reports The Guardian.

British police counter-terrorism network and the domestic security service, MI5 is carrying out an investigation on the attack.

The blast is the worst terror incident in Britain since the 7/7 bombing in 2005 which hit London’s transport network, killing 52 people.