ANKARA, April 16 (Xinhua) --Three people were killed on Sunday during an exchange of gunfire at a referendum polling station in Turkey's southeastern province of Diyarbakir.
The clash occurred between two groups due to differing political views in a schoolyard, which is used as a polling station, Dogan News Agency has reported.
Mehmet Yildiz, son of Yabanardi village chief, was detained as he opened fire after quarrelling with others.
Security forces were dispatched to the area as part of security measures. An investigation was ongoing by gendarmerie forces.
Over 55 million Turkish citizens began voting across the country on Sunday in a historic referendum proposing key constitutional changes, including giving wide-ranging executive powers to the president.