A prominent Russian journalist and critic of President Vladimir Putin was shot dead in Ukraine, where he had fled into exile following threats, police said on Tuesday.

Arkady Babchenko, 41, died of his wounds in an ambulance after his wife found him covered in his blood in their home, police said, adding they suspected the murder was due to Babchenko's professional activities.

Babchenko, a former soldier in the Chechen War who became one of Russia's best-known war correspondents, had left his homeland fearing for his life after criticizing Russian policy in Ukraine and Syria.