A suicide bomber was responsible for Monday night's explosion at the Manchester Arena in England, according to an NBC News report.
The unknown attacker reportedly carried a bomb in a backpack and may have set it off by the venue's box office as attendees began to stream out of an Ariana Grande concert that night. Two explosions occurred containing nails, according to a CBS report. No terrorist group has claimed responsibility for the attack as of the writing of this article.
A mysterious reference to a former state board is on the heavy black door, but no one knows what's behind it. It has a lock with a combination that no one seems to know.
