So what are you implying, having no more information that the rest of us here?
Are you going to call it a suicide bombing? Based on what?
An accidental detonation? Based on what?
A terrorist act? Based on what?
A stadium bombing? It wasn't in the stadium.
All we know is that something went 'boom' and someone got killed who was in the vicinity of the 'boom.'
We don't even know if the two are connected.
I could have said, 'the explosion that occured near the stadium last night,' but 'stadium incident' was sufficient.