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Lithuania flag. [AFP]

Lithuania's governing coalition named a new prime minister on Tuesday, after a coalition reshuffle that expelled a populist junior partner.

The appointment of Mindaugas Sinkevicius -- the head of the Social Democratic party who briefly served as economy minister -- was confirmed by Lithuanian president Gitanas Nauseda.

Sinkevicius will replace current prime minister Inga Ruginiene, also a Social Democrat.