Leonid Volkov, who worked with Navalny as a top adviser, was injured outside his home in Lithuania.

A longtime aide to the late Russian opposition leader Alexei Navalny was attacked with a hammer outside his home in Lithuania on Tuesday, less than a month after the fierce critic of Vladimir Putin died in prison.

Leonid Volkov, who worked with Navalny as a top adviser and helped run his campaigns, was left bloodied after the attack, a spokesperson who worked for the opposition leader wrote on X. Navalny’s Anti-Corruption Foundation posted brutal photos on the social media site, which show Volkov with a bloody leg and face injuries.

Volkov has lived in Lithuania in self-imposed exile for at least four years. A court in Moscow had ordered his arrest in 2021 on charges officials condemned as “politically motivated prosecution.”