Protesters were to join a mass rally in Istanbul Saturday at the call of Turkey's main opposition CHP over the jailing of the city's mayor Ekrem Imamoglu, a top figure in the party whose arrest has sparked 10 days of the country's biggest street demonstrations in a decade.
Imamoglu's detention on March 19 has also prompted a repressive government response that has been sharply condemned by rights groups and drawn criticism from abroad.
