Hi 9Aplus, your response came in as I was posting the photos.
If the wire cutter impacted the blades, then there would be damage on the leading edge of the blades and I see no evidence of that on the two blades visible on that web site. Further, I suggest that a sideways swipe on the wire cutters by a blade at even moderate rotational speeds would have at least produced some significant bending of the wire cutter in the direction of rotation. I don't see that either.
I don't think that the wire cutters played any part in this event. It is pure coincidence that the blade came to rest against the wire cutter.
Just to be clear, I am not saying that my theory is the cause. I just request that investigators eliminate it by appropriate engineering assessment of the failure surfaces. I'd be happy to discuss the matter with them (at no charge) if they wish to contact me.
Regards
blakmax