I'm with Flare Dammit.
It might not seem wholly appropriate, but what else you gonna do?
We all feel a sense of loss, of helplessness, tragedy. One (or more) of us bought the farm.
If somebody had invented the right thing to do or say in all circumstances, it'd be easy.
Until they do, it's just - Jeez. Bummer.
Or to put it another way, 'my thoughts go out to the families.'