19 Killed, 50 Injured in Manchester Concert Explosion

A tragic incident occurred at an Ariana Grande concert in Manchester, where an explosion resulted in 19 deaths and 50 injuries. The police are treating it as a potential terrorist attack. Witnesses reported a loud bang as the concert ended. The area has been sealed off, and emergency services are on the scene. The market reaction has been muted so far, but further developments could change this.

What type of incident are authorities considering this explosion to be?

What did witnesses report hearing just after the concert?