The penalties will target £1.7bn of trade to further weaken Vladimir Putin's Ukraine invasion.
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Video caption: Ukraine war: Belarusian dissidents fight against Russia in Ukraine Belarusian dissident Pavel Kulazhanka left his life in New York to join the fight against Russia.
Fighting for Ukraine - the Belarusian resistance movement
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Video caption: Pavel is among a group of dissidents from Belarus fighting against Russia. Heading to Ukraine to fight Russian forces are dissidents from Belarus. They see the war as a battle against Vladimir Putin’s forces and President Lukashenko's regime in Belarus.
By David Shanks
BBC Scotland reporter
By Oleh Chernysh
BBC News Ukrainian
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Video caption: Tikhanovskaya: Fate of Ukraine and Belarus interconnected The Belarus opposition leader says the fates of her country, her jailed husband and Ukraine are entwined.
Svetlana Tikhanovskaya, Belarus Opposition Leader
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Video caption: Stephen Sackur speaks to the exiled Belarus opposition leader Svetlana Tikhanovskaya. Stephen Sackur speaks to the exiled Belarus opposition leader Svetlana Tikhanovskaya. Is the fate of Belarus now tied to the fate of Ukraine?
By Dan Roan & Simon Stone
BBC Sport
By James Landale
Diplomatic correspondent