Two years to the day since the death of Russian opposition leader Alexei Navalny in a Siberian prison, floral tributes have been left in Moscow by supporters.
The UK and allies have blamed the Kremlin following analysis of material samples found on his body, which shows he was killed using a poison developed from a dart frog toxin.
According to Tass news agency, Moscow has dismissed the finding as "an information campaign", but UK Foreign Secretary Yvette Cooper said there is no explanation for the toxin, called epibatidine, being found.
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L'edizione della notte del Tg diretto da Enrico Mentana
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