Two dead, one wounded at gunfire exchange at a polling station in the southeastern province of Diyarbakır on Sunday's Turkish constitutional referendum, Doğan News Agency has reported.

The proposed reform, passed by Turkish parliament on 21 January, would change the country's parliamentarian system of governance into a presidential one, which the opposition denounced as giving more power to Turkish president Recep Tayyip Erdogan.

The deadly clash occurred between two groups due to differing po...