Russian authorities have issued an international warrant for the arrest of a man known as Mustang Wanted, for his involvement in painting the Ukrainian colors blue and yellow on top of the Stalinist Seven Sisters Tower in Moscow, The Art Newspaper has reported. Ukrainian authorities have refused to extradite the alleged perpetrator.

Mustang Wanted described his action, which was discovered in the early hours of August 20th, as performance art dedicated to his native Ukraine’s day of independence. The stunt garnered prominent supporters, including Ukrainian president Petro Poroshenko who announced in a televised address: “I really liked that on the eve of the Ukrainian flag day they repainted a high-rise in Moscow in our colors. I congratulate these Ukrainians.”

In addition, Mustang Wanted recently declared on social media that the four young Russians being held for the act, Yevgeniya Korotkova, Anna Lepyoshkina, Alexander Pogrebov and Alexei Shirokozhukhov are innocent. The quartet is currently under house arrest and could face prison sentences if convicted. (Russian Activists Face Jail for Painting Moscow Building)

In recent weeks several performances in solidarity with Ukraine have captured media attention. Last week in St. Petersburg a blindfolded women wrapped in a Russian flag with blood red hands staggered through the city centre in protest against Russia’s occupation of Ukraine. On Sunday three young women revealed their blue and yellow-painted breasts at a polling station during elections in Moscow. And on Tuesday monuments in Lithuania honoring fallen Soviet soldiers were painted in blue and yellow.