"Alexei has toxic poisoning", she wrote on Twitter. He said Poland supports the efforts to provide Navalny with the best available treatment and that he was concerned about the decision not to let him leave the country.
Kremlin spokesman Dmitry Peskov said claims of poisoning were "only assumptions" until tests proved otherwise. He added that tests would be ready in two days.
"His active treatment is ongoing", said Dr. Kalinichenko. "Doctors aren't simply doing everything possible".
Tass reported that police were not considering deliberate poisoning.
"The diagnosis of poisoning will remain at the back of our minds". "We believe that Putin definitely is a person who gives that go-ahead in this situation".
Earlier Friday, Navalny ally Ivan Zhdanov said police had found traces of a poisonous substance in the politician's system, but he did not identify it. Police officials did not confirm Zhdanov's statement.
Alexei Navalny is fighting for his life after drinking tea that his allies believe was laced with poison.
Omsk hospital deputy chief doctor, Anatoly Kalinichenko, also said that no traces of poison were found in Navalny's body.
A Bombardier Challenger 604, which arrived earlier at Omsk Airport to take Navalny to a hospital in Germany, is scheduled to depart early in the morning on 22 August, according to airport authorities, potentially with the political activist on board.
The Russian government said Thursday that medical authorities would promptly consider any request to move him to a European clinic and were being open about his medical condition. "Now, at the last moment, doctors are not giving permission".
Ms Yarmysh said the police had been called to the hospital.
"The Duma elections are particularly important for the Kremlin", as the new Duma will be operating in 2024, when Putin's current presidential term expires and he may announce running for re-election, Gallyamov told the AP. On Wednesday, he posted a photo on Instagram from the city of Tomsk with the caption: "Crooks wont kick themselves out of the city parliament!" The move seemed largely aimed at exerting pressure on Russian Federation.
There is a long history of Kremlin foes being poisoned or falling ill after suspected poisonings.
"If true, the suspected poisoning of Russian oppositionist Aleksey Navalny represents a grave moment for Russia, and the Russian people deserve to see all those involved held to account", spokeswoman Rebecca Ross said, using a different spelling for Navalny.
That same year, Verzilov was rushed to a Moscow hospital after suddenly losing his sight, hearing and mobility.
A plane organized by the Berlin-based Cinema For Peace Foundation landed in Omsk at around 12 p.m. local time on Friday to take Navalny to the Berlin Charité hospital, according to Deutsche Welle. In 2018, it arranged for the treatment of Pyotr Verzilov - an activist with Russian protest group Pussy Riot - who had symptoms of poisoning.