From the BBC:
"The "Arbeit macht frei" sign stolen from Auschwitz in southern Poland has been found in the north and five men have been arrested, police say."
This is good news. However, the original sign should never have been left up. It's too important and too easy to steal on location. It should have been removed and put on public display in a safe area, under 24 hour security. A replica should be put in its stead. This type of replica replacement is not unusual.
1"Police in Poland find sign stolen from Auschwitz gate" - BBC