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.
Supporters of the mayor, Ekrem Imamoglu, said that corruption charges against him were a ploy to hobble the main political rival of President Recep Tayyip Erdogan.
Opponents say President Recep Tayyip Erdogan manipulates the courts and the media to tighten his grip on power, and now is trying to prevent a top contender from running for president.
The mayor, Ekrem Imamoglu, was detained after prosecutors accused him of corruption and terrorism. The opposition said the arrest was politically motivated.
Turkey is still bombing armed Kurdish insurgents in Iraq and Syria, even after their leader urged them to lay down their arms and disband, and their group declared a cease-fire.
The group, the P.K.K., made its declaration days after its long-imprisoned leader urged the movement to disarm and disband, but there are still many questions about the prospects for ending 40 years of deadly conflict.