Russia’s Alexei Navalny, a fierce anticorruption campaigner who galvanized the country’s political opposition, has died in prison, Russian news agencies reported Friday.

The cause of his death was still being established, said prison authorities, cited by Russian news agency TASS.

Navalny had been serving sentences in a penal colony amounting to more than 30 years on various charges. He was 47 years old.

A statement from the prison authorities said that he had felt unwell following a walk outside and lost consciousness. The statement said a medical team was called on site but was unable to save him.... Read More: WSJ