You seem to be doing the knee jerk defend the dark skinned guy routine, when I think the point is they are just flat out looking suspicious. The edgy look on their faces, the location where they are standing in relation to the explosion, the bags. They may not be the villains, but they are defiantly more suspicious than 99% of the people in that photo.
I don’t see anything suspicious about them at all.
I predict they will turn out to be a non-issue, based on all the wrong info being put out by the media all along.