This article is published by Deutsche Welle. Here is an excerpt:

Several celebrities and public figures have penned a joint letter to Russian President Vladimir Putin, calling on him to offer treatment to detained Kremlin critic Alexei Navalny.

Figures including author J.K. Rowling, actors Benedict Cumberbatch and David Duchovny called on Putin to offer Navalny, who is currently on a hunger strike, immediate medical treatment.

“As we write, Alexei Navalny is being held in a penal colony that many lawyers and human rights activists consider to be one of the harshest in Russia,” the letter said.

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