A video surfaced Friday showing Alexei Navalny, a prominent critic of Russian President Vladimir Putin, making a court appearance just a day before Russian officials say he collapsed and died at a penal colony in Siberia. 

Footage shared by the Russian news outlet SOTAvision showed the 47-year-old laughing and appearing in good spirits while behind bars at the IK-3 penal colony, also known as “Polar Wolf,” in Kharp in northern Russia. Navalny made the appearance in Russia’s Supreme Court by video link, according to The Associated Press. 

Earlier Friday morning, Russia’s prison agency announced that Navalny felt unwell after a walk and lost consciousness. An ambulance arrived to try to rehabilitate him, but he died, a statement added. 

Navalny’s spokesperson said in a post on X that “we have no confirmation of this yet

Alexei Navalny used a court appearance in late May 2022 to criticize Russian President Vladimir Putin over his invasion of Ukraine. (REUTERS/Evgenia Novozhenina)

Navalny had previously organized anti-government demonstrations and had run for office to advocate for reforms against what he claimed was corruption in Russia. He was the victim of an alleged assassination attempt in 2020, when he suffered poisoning from a suspected Novichok nerve agent.  

He remained in a coma for several weeks while doctors in Germany fought to keep him alive. He accused Putin of being responsible for his poisoning. 

Russian opposition activist Alexei Navalny takes part in a march in memory of opposition leader Boris Nemtsov in Moscow on Feb. 29, 2020. (AP/Pavel Golovkin)

Navalny then returned to Russia in 2021, when authorities immediately arrested him and later sentenced him to 19 years in prison on extremism charges. His team has repeatedly raised concerns about his treatment following his return, and Navalny said the charges were politically motivated. 

The Associated Press contributed to this report.