Navalny, 44, was flown to Berlin for treatment at the Charite hospital two days after falling ill on a domestic flight in Russia on Aug. 20. Germany has demanded that Russia investigate the case.

He has “successfully been removed from mechanical ventilation” and is able to leave his bed “for short periods of time,” the hospital said.

Although noting the improvement in Navalny’s health, the statement didn’t address the long-term outlook for the anti-corruption campaigner and most prominent opponent of Russian President Vladimir Putin. Doctors have previously cautioned that even though Navalny is recovering, long-term health problems from the poisoning cannot be ruled out.

The Kremlin has bristled at calls from German Chancellor Angela Merkel and other world leaders for Russia to answer questions about the poisoning, denying any official involvement and accusing the West of trying to smear Moscow. Russian Foreign Minister Sergey Lavrov canceled a visit to Germany scheduled for Tuesday, his ministry announced.

In Novosibirsk, which Navalny visited days before falling ill, the head of his regional headquarters, Sergei Boiko, won a seat in the city council. The main Kremlin party, United Russia, which Navalny has dubbed a “party of crooks and thieves,” lost its majority on the council, according to the preliminary returns. Another Navalny representative, Ksenia Fadeyeva, won a city council seat in Tomsk, the city he left on the flight on which he fell ill.

The German government said tests by labs in France and Sweden had backed up earlier findings by a German military lab that Navalny was poisoned with Novichok, the same class of Soviet-era agent that British authorities said was used on former Russian spy Sergei Skripal and his daughter in Salisbury, England, in 2018.

The Hague-based Organization for the Prohibition of Chemical Weapons also is taking steps to have samples from Navalny tested at its designated laboratories, German government spokesman Steffen Seibert said.

He said Germany had asked France and Sweden for an independent examination of the findings. German officials said labs in both countries, as well as the OPCW, took their own new samples from Navalny.

“In efforts separate from the OPCW examinations, which are still ongoing, three laboratories have meanwhile independently of one another presented proof that Mr. Navalny’s poisoning was caused by a nerve agent from the Novichok group,” Seibert said.

“We once again call on Russia to make a statement on the incident,” he added. “We are closely consulting with our European partners regarding possible next steps.”

Seibert wouldn’t identify the specialist French and Swedish labs. But the head of the Swedish Defence Research Agency, Asa Scott, told Swedish news agency TT: “We can confirm that we see the same results as the German laboratory, that is, that there is no doubt that it is about these substances.”

French President Emmanuel Macron expressed “deep concern over the criminal act” that targeted Navalny during a phone call with Putin on Monday, Macron’s office said.

Macron confirmed that France reached the same conclusions as its European partners on the poisoning, according to the statement. “A clarification is needed from Russia within the framework of a credible and transparent investigation,” it added.

The Kremlin said Putin in the call “underlined the impropriety of unfounded accusations against the Russian side” and emphasized Russia’s demand for Germany to hand over Navalny’s analyses and samples to Russian experts. Putin also called for joint work on the case by German and Russian doctors.

With Germany’s findings corroborated by labs abroad, “we do not expect the bringer of the bad news -- namely us -- to be attacked further, but rather that they should deal with the news itself,” German Foreign Minister Heiko Maas said of Russian authorities.

Russian officials have prodded Germany to share the evidence that led it to conclude “without doubt” that Navalny was poisoned with Novichok. Berlin has rejected suggestions from Moscow that it is dragging its heels.

Asked why no samples from Navalny have been given to Russia, German Foreign Ministry spokeswoman Maria Adebahr replied that “Mr. Navalny was in Russian treatment in a hospital for 48 hours.”

When he fell ill, Navalny was taken to a hospital in the Siberian city of Omsk, where Russian doctors said no evidence of poisoning could be found and said he was too unstable to be transferred. A German charity sent a medical evacuation plane to bring him to Berlin, which it did after German doctors said he was stable enough to be moved.

“There are samples from Mr. Navalny on the Russian side,” Adebahr said. “The Russian side is called on, even after three independent labs have established the result, to explain itself, and Russia has ... all the information and all the samples it needs for an analysis.”

Navalny was kept in an induced coma for more than a week as he was treated with an antidote before hospital officials said a week ago that his condition had improved enough for him to be brought out of it.