A child with bloodied clothing lies in a hospital, unable to move because her legs have been blown off. CNN
What does "her legs have been blown off" mean?
Does it describe the way how her legs have been damaged? Does it mean an explosion or shooting? Or does it refer to the current state of her legs? Does it mean she lost her legs or that she has burns on her legs?
Edit: Related, therefore I will amend my question.
In the same article it is also said:
We have pictures of children under the age of 14 with half of their faces blown away, [...]
In my understanding, to blow away means to kill someone.
In this context it sounds a bit different. Is it the same meaning as the answers given for to blow off mention? (Here: to lose a part of the face.)