Individuals who display the letter “Z” in Germany to symbolise support for Russia’s war in Ukraine could be liable to prosecution, an Interior Ministry spokesperson said on Monday.

The interior minister for the state of Berlin said earlier that city authorities would jump on cases of the Z symbol being used to endorse Russia’s aggression, following announcements by Bavaria and Lower Saxony that they too would punish such acts.

A spokesperson for the federal government’s Interior Ministry told reporters: “The letter Z as such is of course not forbidden, but its use may in individual cases constitute an endorsement of the Russian war of aggression.”