Russian opposition leader Alexei Navalny, who is charged with participation in an unauthorised protest rally, attends a court hearing in Moscow, Russia July 1, 2019. REUTERS/Tatyana Makeyeva
Russian opposition leader Alexei Navalny, who is charged with participation in an unauthorised protest rally, attends a court hearing in Moscow, Russia July 1, 2019. REUTERS/Tatyana Makeyeva

Russian opposition leader Alexei Navalny says he may have been poisoned in prison