To pressure President Recep Tayyip Erdogan over the jailing of his top rival, the opposition wants Turks to boycott companies that back Mr. Erdogan and plans to organize a protest this weekend.

Istanbul's opposition-run municipal council on Wednesday elected an interim mayor to run the city, after mayor Ekrem Imamoglu was jailed pending trial over graft charges that he and his supporters deny and call politicised.

The head of Turkey’s main opposition party has visited jailed Istanbul Mayor Ekrem Imamoglu after six nights of massive protests calling for his release.