Riot police officers use pepper spray to clear a protester during a protest after Istanbul's Mayor Ekrem Imamoglu was arrested and sent to prison, in Istanbul, Turkey, Sunday, March 23, 2025. (AP Photo/Huseyin Aldemir)
ISTANBUL (AP) — Hundreds of thousands of opposition supporters gathered outside Istanbul city hall Sunday night to protest the arrest of the city’s mayor, a key rival to Turkish President Recep Tayyip Erdogan.