EU leaders have also issued fresh warnings to the Russian government, stating the sanctions placed on the state earlier this year could be increased.
Commission President, Ursula von der Leyen said: “I am deeply worried about Alexei Navalny’s health.
“He must immediately receive access to proper medical treatment.
“The EU continues to call for his immediate and unconditional release.”
The EU’s foreign affairs representative, Josep Borrell also admitted his concern over the health of Mr Navalny.
He warned this is the latest incident in Russia continual “negative pattern”.
Mr Navalny has been on hunger strike since March 31 after he claimed Russian guards are not treating him properly.
Mr Navalny, who has been a critic and political rival of Putin, is currently in a Russian penal colony.
A doctor working on behalf of his family, Yaroslav Ashikhmin, claimed Mr Navalny has high potassium levels in his blood.
He said: “Our patient could die at any moment.”
More to follow…