Ex counter-terror chief: 'This is a step up'
Twenty-two people, including children, are now known to have been killed and 59 injured in a suspected terror attack at Manchester Arena.
The blast happened at 22:35 BST on Monday at the end of a pop concert by the US singer Ariana Grande.
Chris Phillips, former head of the National Counter Terrorism Security Office said this was a "step up" from previous attacks.
(Image: Police standing outside Manchester arena, credit: Getty Images)