MOSCOW (AP) — Imprisoned opposition leader Alexei Navalny has been handed new charges by Russian prosecutors.

The 47-year-old is already serving more than 30 years in prison after being found guilty of crimes including extremism — charges that his supporters characterize as politically motivated. In comments passed to his associates, Navalny said he had been charged under article 214 of Russia’s penal code, which covers crimes of vandalism.