ZURICH—The Swiss government on Tuesday added 13 people and five organizations to the list designed to prevent the country being used by Russia to bypass sanctions imposed earlier this year by the European Union over the crisis in Ukraine.

The Swiss Secretariat for Economic Affairs said the new people listed include Sergey Kozyakov, head of the election commission in the eastern Ukraine region of Luhansk, as well as 12 other officials from the so-called Luhansk and Donetsk People’s Republic.

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