BRUSSELS—The European Union and Britain imposed sanctions Thursday on six Russians, some among the highest-ranked officials in the nation, and one organization over the poisoning of Russian opposition leader Alexei Navalny with a Soviet-era nerve agent.
Foreign Minister Heiko Maas of Germany, which holds the EU’s rotating presidency, said that “only with a clear position and by sticking to principles can we as the European Union make progress with respect to Russia.”