As the world mourns Navalny, leaders and supporters point at Russia's government

A man holds a poster with a portrait of opposition leader Alexei Navalny during a protest in front of the Russian Embassy in Berlin on Friday. Navalny, who crusaded against official corruption and staged massive anti-Kremlin protests as President Vladimir Putin's fiercest foe, died Friday in the Arctic penal colony, Russia's prison agency said. (Markus Schreiber/AP)

The international reaction to the death of prominent Russian opposition leader Alexei Navalny was swift. World leaders and senior officials, exiled Russians and Kremlin watchers praised his activism and, in many cases, laid blame squarely on the Russian government's shoulders.

Russia's Federal Penitentiary Service said Navalny, who was 47, lost consciousness after taking a walk in a remote Arctic prison where he was serving a lengthy sentence for multiple charges. Navalny's supporters see the charges as stemming from Navalny's criticism of Russian President Vladimir Putin.