Very unverified.
From Ukrainska Pravda, May 27:
Valery Tsepkalo, Belarusian opposition leader, said that after a meeting with Russian President Vladimir Putin, the self-proclaimed President of Belarus Alexander Lukashenko was taken to the Central Clinical Hospital of Moscow in critical condition.
Source: Tsepkalo on Telegram
Quote: "According to the information we have, which needs additional confirmation, Lukashenko, after meeting with Putin behind closed doors, was urgently taken to the Central Clinical Hospital of Moscow, where he is now located. The best specialists were sent to return him from a condition assessed by doctors as critical. [His - ed.] blood was purified, Lukashenko's condition was proclaimed not transportable.
The organised measures to save the Belarusian dictator were intended to ward off speculation about the possible participation of the Kremlin in his poisoning. It does not matter whether he returns to working condition or not, doctors warn of a possible recurrence of relapses. "....
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