This is an entry from: LIVE: Turkey votes on whether to expand president's powers
Turkish citizens line up at polling stations to cast their votes
16 April 2017 13:14 BST
More than 55.3 million Turks are eligible to vote on sweeping changes to the president's role.
Polling stations opened in the east of the country at 0400 GMT, while voting in Istanbul, Ankara and other cities got under way an hour later.
The last polls close at 1500 GMT with first results expected shortly after.