German authorities have prohibited a planned pro-Palestinian vigil at the Buchenwald Nazi concentration camp memorial, saying the event will not be allowed on the site following public and political opposition.

The event, organized by Kufiyas in Buchenwald, had been set for April 12 to mark the 81st anniversary of Buchenwald’s liberation by US troops.

The city of Weimar said Monday it would not permit the rally at the memorial itself and instead proposed a downtown square as an alternative location.