UK Sanctions Russian Prison Chiefs After Activist's Death.
UK has frozen the assets of six Russian prison bosses in charge of the Arctic penal colony where opposition leader Alexei Navalny died.
The sanctioned individuals will also be banned from travelling to the UK.
Western leaders say the blame for Navalny's death lies with the Russian authorities, including President Putin.
The UK is the first country to impose sanctions in response to his death, the Foreign Office says.
The US has also announced it will be unveiling its own package of sanctions against Russia over Navalny's death and the ongoing war in Ukraine on Friday.
The British government has called for Navalny's body to be released to his family immediately and for a full and transparent investigation to take place.
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