Kremlin critic Alexei Navalny made his first public appearance after being discharged from a Berlin hospital where Germany said he was being treated for poisoning by a potentially deadly nerve agent.

Navalny was flown from Russia to Berlin last month after falling ill on a domestic flight in Siberia. The West has demanded an explanation from the Kremlin, which has denied any involvement in the incident and said it has yet to see evidence of a crime.