This is the best summary I could come up with:

The Russian opposition politician Alexei Navalny - a vocal critic of President Vladimir Putin - has died, according to the prison service.

The Federal Penitentiary Service for Yamal said in a statement: "On 16.02.24 in the correctional colony number three, convict Navalny felt ill after a walk almost immediately losing consciousness.

Russian President Vladimir Putin has been informed of his death according to the state news agency TASS.

"His health has been deteriorating… he has been held in solitary confinement for much of the time since he was imprisoned after his return to Russia in January 2020.

"But it does seem very shocking that his health should have deteriorated to the extent that he’s dead now - given we have seen him in court videos, we have also had a lot social media presence from him via his lawyers where he is constantly seen upbeat and cheerful.

“Yes, he’s been put through a lot by the prison systems but we have not had an indication that he would die this suddenly, so I just wonder if something specific happened to him.”

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