ISTANBUL Turkish authorities launched the fifth wave of a sweeping corruption probe targeting the Istanbul Metropolitan Municipality (İBB) and district municipalities, detaining 30 of 47 suspects, including five district mayors and former CHP lawmaker Aykut Erdoğdu. Arrest warrants were issued for allegations of bribery, bid rigging, and organized crime by the Istanbul Chief Public Prosecutor’s Office. The operation, spanning four separate investigations, uncovered illicit activities involving