Siberian hospital officials assert opposition leader too unstable to be evacuated, while allies assert authorities are stalling to prevent detection of poisoning

Top US diplomat accuses countries of 'siding with ayatollahs'; Russia withdraws request for UN meeting to extend sanctions relief after apparent US move to block summit

While spokeswoman for anti-corruption campaigner points finger at Putin, Moscow says claims of sabotage 'only assumptions' until tests prove otherwise

Spokesperson says Putin critic fell ill on flight, is on a ventilator in intensive care, after apparently consuming toxin that was placed in his tea

Iranian health minister says domestically produced shot passed animal trials; Russia calls widespread skepticism over its vaccine rollout 'absolutely groundless'

Strongman president offers 'to be experimented on' as Southeast Asian country, with some 27 million people under lockdown, pushes to be candidate for overseas clinical trials

Medical center's CEO Zeev Rotstein says its clinic in Moscow is conducting trials that will 'take time;' Putin has claimed vaccine 'passed all the necessary tests'

Yuli Edelstein says if Moscow's announcement of a functioning inoculation to protect against coronavirus is verified, countries will enter into negotiations

Announcement comes after WHO last week urged Moscow to follow established guidelines and go 'through all the stages' to develop safe vaccine

Security Council likely to reject Washington resolution calling to extend ban on conventional weapons sales indefinitely