Alexei Navalny's team has called on supporters to take to the streets on Wednesday. (File) Vladimir: A team of medics including ailing Kremlin critic Alexei Navalny's personal doctor were denied access Tuesday to a penal colony where he is being treated at a prison hospital. Navalny, 44, launched a hunger strike on March 31 and his medical team over the weekend warned that his health was failing so rapidly he could die at "any minute". Russia's prison service, which has repeatedly prevented Navalny's doctors from visiting him, on Monday moved him from his penal colony in the Vladimir region some 100 kilometres (60 miles) east of Moscow to a medical facility at another colony in the same region.