This entry piqued my curiosity, and I did a cursory search for the original broadcast; what wording does a government use to position an announcement like this? I didn't find a recording, but I did find a related article from June 12, 1942
I wasn't familiar with the incident either. At first, I assumed it was Oradour-sur-Glane, which was a similar case but in France. I have seen drone footage of current-day Oradour-sur-Glane on Youtube.
https://nytimes.com/1942/06/12/archives/nazis-kill-34-more-i...
...and a newsreel statement from Czechoslovakian President-in-exile Beneš from June 29, 1942
https://youtu.be/QFMJYhJNmeQ