Two swastikas and praise for the leader of Nazi Germany were found scratched into a concrete block forming part of the Memorial to the Murdered Jews of Europe in the German capital Berlin Friday.

In a separate incident, the Sachsenhausen concentration camp memorial site pushed back against false reports circulating on the Telegram messaging app that the site would be used to house Ukrainian refugees.

Police said a security guard discovered the hateful graffiti on Friday morning at the site that serves as a memorial to the six million Jews murdered by Nazi Germany and accomplices during the Holocaust.

The memorial, located near the Brandenburg Gate and the Bundestag, the German parliament, opened in 2005.

It is not the first time unwanted messages of racist hate have appeared on the memorial.

Germany's State Security Service has started an investigation. At present, it is not known who is responsible for the fascist symbols and slogans.