Alexei Navalny wearing a black jacket looks into the distance with Russian flags behind him.
Alexei Navalny takes part in a march at Strastnoy Boulevard in Moscow, Russia.
  • The Russian opposition politician Alexey Navalny has died in prison.
  • The 47-year-old was being held in an Arctic penal colony with harsh conditions.
  • He was the only effective political rival to Vladimir Putin, and his imprisonment was widely condemned as political.

Alexey Navalny, Vladimir Putin's political nemesis, died suddenly in prison at the age of 47, officials said.