what happened to anjas grandparents and where did they go?

The family receives notice that all Jews over seventy years of age will be transferred to a new community specifically designed for the care of the elderly. Anja's grandparents are ninety. At the time, they have not yet heard of the concentration camps, but they do not want to be separated, so the family hides them behind a false wall in a storage shed. When police come looking for them, they are told that they left about a month ago without a word. But the police arrest Anja's father, and a few days later the family receives a note from him saying that if they don't give up the grandparents, the Germans will return to take more members of the family. The grandparents are taken away to Auschwitz.