Turkey has wrapped up a crucial parliamentary election that will determine whether the constitution can be rewritten to bolster the powers of President Recep Tayyip Erdogan.

Polls have closed but preliminary results are not expected until later today.

Mr Erdogan himself was not on the ballot but the election is effectively a referendum on whether to endow his office with extraordinary powers that would significantly change Turkey's democracy and prolong his reign as the country's most powerful politician.

Mr Erdogan's ruling Justice and Development Party, the AKP, is expected to win significantly more votes than any opposition party but it must win a super-majority of 550 seats in parliament to change the constitution.

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