This is an extra. It is not an event on Western soil but these events are certainly not limited to Western countries, it's just that they have more coverage and that's why I've focused on those.
All I say for this event is - look at the images and do a TELL and SHOW comparison. What type of event do you think they fit better? A real bombing where 500 people were killed and, however many were injured (interestingly, I do not see in the media an estimated number of injured given) or an anti-terror drill pushed out as real?