A few days after he announced he would sell his Nobel peace prize medal at auction – and give the millions of dollars raised to Ukrainian refugees – the Russian newspaper editor Dmitry Muratov was sitting on a train bound for the city of Samara.

Just before the train pulled away from Kazansky station in Moscow, the door to his carriage was flung open and a masked man threw a bucket of stinking red liquid over him, shouting the words: “This is for our boys!” The liquid – it turned out to be paint mixed with acetone – drenched Muratov in crimson and half-blinded him, but he still had the presence of mind to chase his attacker down the platform. He apprehended the masked man talking to a police officer and demanded his arrest. No action was taken.