Manchester police have not said anything about the suspected motives of the lone male bomber. It is not clear whether they have identified the man, but reports suggest identification documents may have been discovered on his remains.
The bomber blew himself up just after Grande finished her concert and fans were starting to leave the arena. He detonated his improvised explosive device in an entrance foyer of the large sports arena. Police said he was killed.
Several parents were still frantically searching for their children on Tuesday morning.
Dozens of concert goers were given shelter at a nearby hotel, including unaccompanied children, but messages on social media suggested as many as eight people were still unaccounted for, several of them teens.