Voters in Turkey have returned to the polls to decide whether the country's long-time leader Recep Tayyip Erdogan stretches his rule into a third decade or is unseated by a challenger who has promised to restore a more democratic society.

Voters in Turkey have returned to the polls to decide whether the country's long-time leader Recep Tayyip Erdogan stretches his rule into a third decade or is unseated by a challenger who has promised to restore a more democratic society.