Kremlin critic Alexei Navalny fell deathly ill on a flight to Moscow after drinking from a poisoned bottle of water in his hotel room in Siberia, his team claimed Thursday.

Laboratories in Germany, France and Sweden have established he was poisoned by the Soviet-style nerve agent Novichok, though Russia has strongly denied this and said it had seen no evidence.

On Thursday, Navalny’s team posted a video on Instagram showing them searching the room he had just left in the Xander Hotel in Tomsk an hour after they learned he had fallen sick under suspicious circumstances, Reuters reported.

The fact that the case would not be investigated in Russia was quite obvious,” the team said in the post.

The footage from the abandoned hotel room shows two water bottles on a desk and another on a bedside table — as the team members, wearing gloves, place items into blue plastic bags.

“Two weeks later, a German laboratory found traces of Novichok precisely on the bottle of water from the Tomsk hotel room,” the post reads.

“And then more laboratories that took analyses from Alexei confirmed that that was what poisoned Navalny.

Now we understand: it was done before he left his hotel room to go to the airport.”.

Navalny’s aides had previously said they suspected he had been poisoned with a cup of tea he drank at Tomsk airport.

Vladimir Milov, a former deputy energy minister and an ally of Navalny, said his team members had outsmarted the Russian security police.

On Tuesday, Navalny posted a photograph of himself from his bed in Berlin’s Charite Hospital, hugged by his wife and children

The Kremlin has said that Russian doctors who treated Navalny in Omsk had found no sign that he was poisoned

Russia has repeatedly urged Germany to share Navalny’s analyses and other medical data and compare notes with the Russian doctors

German officials have responded by saying that Russian authorities must have the samples already since Navalny spent two days in the Omsk hospital