Russian opposition leader Alexei Navalny has been taken to a prison hospital after his team warned his health is deteriorating and he could die "in a matter of days."
Navalny, the prominent critic of Russian President Vladimir Putin, was moved to a hospital in a high security prison by Russian authorities on Monday, The New York Times reports.
"With the patient's consent, he was prescribed vitamin therapy," Russia's federal penitentiary service said, per The Washington Post.
Navalny for three weeks has been on a hunger strike, which he began to protest authorities not allowing him to see his personal doctors, according to The Associated Press. He was hospitalized last year after being poisoned with a nerve agent, which he has blamed on Putin.
Physician Yaroslav Ashikhmin has warned that test results show Navalny may be at risk of cardiac arrest due to increased levels of potassium, per NPR. On Friday, Ashikhmin wrote on Facebook, "Our patient could die at any moment." The U.S. has said that Russia will face "consequences if Mr Navalny dies."
After news of his transfer to a prison hospital was announced, top Navalny strategist Leonid Volkov dismissed this step, per The Associated Press, saying, "Until the lawyers locate him, we won't know where he is and what is up with him."