It appears to have been a suicide bomber.
Yes I know that now.
From what I understand is that the bomber was waiting in foyer not actually in the hall
That does seem to be the case tamila. Makes sense really from a terrorist point of view because it was packed with people leaving the concert and also would have more impact in a smaller space than it would have had inside the auditorium.
Meanwhile campaigning has still been suspended until further notice. So this effectively gives May a chance to leave its resumption for as long as it suits her. How convenient!