News brief

Turkish opposition leader arrested. Istanbul’s mayor Ekrem Imamoglu, a key rival of Turkey’s President Recep Tayyip Erdogan, was arrested on March 19 as part of an investigation into alleged corruption and terror links. The state-run Anadolu Agency said prosecutors issued warrants for some 100 people in addition to him. Authorities closed several roads around Istanbul and banned demonstrations in the city for four days in an apparent effort to prevent protests. The arrest followed a search of Mr. Imamoglu’s home a day after a university invalidated his diploma, effectively disqualifying the popular opposition figure from running in the next presidential race.