ISTANBUL (AP) — A media union said Turkish authorities arrested several journalists at their homes in a crackdown Monday, amid growing protests over the jailing of Istanbul’s mayor, a top rival to President Recep Tayyip Erdogan.

A court on Sunday formally arrested Mayor Ekrem Imamoglu and ordered him jailed pending a trial on corruption charges. His detention on Wednesday in Turkey in more than a decade, deepening concerns over democracy and the rule of law.

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