Random or targeted?

(Daily Telegraph)

This bomb scare occurred directly across the harbour from my home yesterday afternoon and last night. Bright police lights at the scene at midnight were strong enough to cast shadows on my walls, oh I'd say, two kilometres distance as the proverbial crow flies.

What little is known about the situation at this point is curious. The linked Sydney Morning Herald report mentions that the 'wealthy family' is at a loss as to why their daughter was targeted. My uninformed view is that the description 'wealthy' might have played a part.