The German government said Friday it was in touch with Moscow to find a solution to Russian opposition figure Alexei Navalny's "humanitarian emergency" after he suffered a suspected poisoning and his doctors refused to allow an evacuation. "We are already in contact with Russian authorities so that we can contribute to a professional and transparent solution to this humanitarian emergency," foreign ministry spokeswoman Maria Adebahr told reporters in Berlin. A medical plane chartered by a German NGO, the Cinema For Peace foundation, is waiting in the Siberian city of Omsk to airlift Navalny to a Berlin hospital for treatment. But doctors treating the anti-corruption campaigner and Kremlin critic said he was too "unstable" to be moved. They also said there was no evidence to back up claims he was poisoned. But Navalny's spokeswoman Kira Yarmysh said the refusal to transport him was a ploy to hide the poisoning and put his life at risk. German Chancellor Angela Merkel is "concerned" about Navalny's health, her spokesman Steffen Seibert said, adding that German hospitals are ready to welcome him. "The main priority is to save his life," he said. He said it was "understandable" that Navalny's relatives and associates reportedly wanted "doctors they trust" to be part of the decision on whether he should be transported. Noting that there existed "a heavy suspicion" that Navalny had been poisoned, Seibert said Merkel had reiterated that the "circumstances of this case must be clarified in a full and transparent manner". Navalny, 44, is among President Vladimir Putin's fiercest critics. He is in a coma in a hospital in Omsk after he lost consciousness while on a flight on Thursday. Aides say they believe he was poisoned and that something was put in his tea at an airport cafe. Navalny's spokeswoman Yarmysh on Friday called the refusal to move him to Germany "a direct threat to his life". Putin's spokesman Dmitry Peskov said it was "a purely medical decision". mfp/wdb