European nations and Russia have engaged in recurring waves of reciprocal diplomatic expulsions following Russia's full-scale invasion of Ukraine in 2022

From the articleAustria expels four Russian diplomats on security groundsAlso in Russia Vows Retaliation After Austria Expels Its Diplomats, Austria expels four Russian diplomats on security grounds, Austria foreign ministry expels four Russian diplomats from Vienna over suspected espionage, Austria expels 4 Russian diplomats linked to espionage, official says