18:00Six O'Clock News16/02/2024 Russia says Alexei Navalny has diedBBC Radio 4 Duration: 30 minutes Fri 16th Feb 2024, 18:00 on BBC Radio 4 FMAvailable for over a yearListen nowRussia says Vladimir Putin's most vocal critic -- Alexei Navalny -- has died in prison -- triggering outrage in the West:GenresNewsBrandSix O'Clock News Source: BBC Online