Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Critics Demand Stronger European Response to Poisoning of Russian Dissidents Henry Ridgwell LONDON - Europe is under growing pressure to offer a more robust response to Russia, following the poisoning of opposition leader Alexei Navalny in Siberia in August. German doctors say he was poisoned with Novichok, a Russian nerve agent. Navalny was flown to Germany for treatment and emerged from a coma in September. Doctors say he is making a good recovery. The Kremlin denies involvement in the attack. The 44-year-old leader of the "Russia of the Future" party says he plans to return to his home country to continue his fight against the government of President Vladimir Putin. German Foreign Minister Heiko Maas said he expects the European Union to impose new sanctions on Moscow. "I am convinced that there will be no longer any way around sanctions," Maas told the news website T-online in an interview Saturday. "Sanctions must always be targeted and proportionate. But such a grave violation of the International Chemical Weapons Convention cannot be left unanswered. On this, we're united in Europe," Maas added. There are growing calls for Europe to take a harder stance against Moscow following a string of attacks in recent decades against opponents of the Kremlin, many on European soil. The Russian defector Alexander Litvinenko died from radioactive polonium poisoning in London in 2006. Britain says the Russian state carried out his killing. Former Russian double agent Sergei Skripal and his daughter Yulia were poisoned with Novichok in 2018, the same agent allegedly used against Alexei Navalny and produced only by the Russian state. Both Sergei and Yulia Skripal survived, but a local woman died after coming into contact with the poison. .