ISTANBUL (AP) — Demonstrations were held Tuesday in Istanbul after Turkish authoritiesdetained a former mayor and dozens of municipal officialsin the western city of Izmir over alleged corruption, extending a crackdown against the country's main opposition party. Officials fromCHP-controlled municipalitiesin Istanbul and elsewhere have faced waves of arrests this year over allegations of corruption. The opposition claims the arrests are politically motivated, but President Recep Tayyip Erdogan's government insists the courts are impartial and free from political involvement. The crackdown comes a year after the CHP made significant gains in local elections. ___ This is a photo gallery curated by AP photo editors.