According to this article (Russian), in June 1945 General Serov reported to Beriia about the following incident.
On May 28th, 1945, a Red Army soldier was shot at by someone from a window in Berlin’s district Prenzlauer Berg. The military police took several inhabitants of the house to the commandant’s office for interrogation.
Rumors spread among the Germans, that the Soviets would stop distributing free food because of that shot. After a while, several delegations of Germans came to the commandant’s office. All of them offered the same thing: To take 30–40 hostages and publicly shoot them. In exchange the Germans wanted the Soviets to continue to give away free food.
Did this actually happen?