The video I was watching a few minutes ago said they did a precautionary detonation of a backpack found nearby. It would only be reported as a bomb if they got a secondary explosion when they detonated it. They did this rather than have someone open it and find out the hard way that it was a bomb, or maybe not. Could be hard on the opener that way...
OIC, I didn't quite understand that they could tell a difference in their own explosion of the backpack and a bomb left by the perp.
~~~~~
Having said what I did about the Ruf-Neks' cannon-boomers and possible timing, confusion, it would then follow that the perp wasn't nescessarily wanting to take just himself out, but was perhaps expecting to live through the explosion and escape, and wanting to get away undetected. That wouldn't constitute a suicide.
If you'd heard the Ruf-Nek "guns," you'd know what I mean. They get me in the pit of the stomach or sometimes the solar plexus. They are LOUD and explosive.