IN PHOTOS: Navalny supporters mourn reported death, label Putin ‘murderer’

Supporters of the leader of Russia's political opposition, Alexei Navalny, showed up to memorials across the world to mourn his reported death.

Supporters of the leader of Russia’s political opposition, Alexei Navalny, showed up to memorials across the world Friday to mourn his reported death.

Russian prison authorities said Friday that Navalny, 47, had died while in prison at a penal colony north of the Arctic Circle, where he was serving a 19-year sentence.

Supporters of Navalny showed up to memorials with signs reading “Putin is a killer,” “We will not forgive,” “Homeland kills,” “do not give up,” and “Putin murderer.”

The U.S. president put the blame for the reported death squarely on Russian President Vladimir Putin, who has previously dismissed Navalny and rarely named him in speeches, sometimes referring to him instead as “that person” or a similar phrase.

“There is no doubt that the death of Navalny was a consequence of something Putin and his thugs did,” Biden said Friday.

Prime Minister Justin Trudeau also blamed Putin for the reported death, saying Friday that the apparent death shows “the extent to which Putin will crack down on anyone who is fighting for freedom for the Russian people.”

“There is no question that Alexei Navalny is dead because he stood up to Putin, he stood up to the Kremlin,” Trudeau said.

About 30 people were detained in St. Petersburg, according to local media, and more than a dozen were detained near a Moscow memorial to political prisoners, according to the OVD-Info monitoring group. The group said arrests also happened in several other cities.