MOSCOW (AP) Several doctors were prevented Tuesday from seeing Russian opposition leader Alexei Navalny in a prison hospital after his three-week hunger strike and prosecutors detailed a sweeping, new case against his organization.

Navalny was transferred Sunday from a penal colony east of Moscow to a hospital unit at a prison in Vladimir, a city 110 miles east of the capital after his lawyers and associates said his condition has dramatically worsened.

His lawyer, Vadim Kobzev, tweeted that Navalny so far has received only one glucose injection since Sunday at the hospital unit, which is intended to treat tuberculosis patients.

Six other attempts to give him a shot failed because paramedics apparently werent qualified enough to find his vein, he said. His arms are all blue with the shots, Kobzev said.

Reports about Navalnys rapidly deteriorating health have drawn international outrage.

His personal physician, Dr. Anastasia Vasilyeva, led three other medical experts to try to visit Navalny at the prison clinic and the IK-3 prison in the city of Vladimir. They were denied entry after waiting for hours outside the gates.

Its a show of disrespect and mockery of the doctors, Vasilyeva tweeted, adding that Navalnys life and health are clearly in danger.

Navalny, who is Russian President Vladimir Putins most adamant opponent, has been on a hunger strike since March 31 to protest the refusal by prison officials to let his doctors visit him and provide adequate treatment for back pains and numbness in his legs.

Russias penitentiary service insists that Navalny was getting all the medical help he needs.

The prison service said in a statement Monday that Navalnys condition was deemed satisfactory, but another of his physicians, Dr. Yaroslav Ashikhmin, said over the weekend that test results provided by his family show Navalny has sharply elevated levels of potassium, which can bring on cardiac arrest, as well as heightened creatinine levels that indicate impaired kidney function.