Turkey's long-standing leader Recep Tayyip Erdogan is ahead in presidential elections with 62% of votes counted, according to state media.
Mr Erdogan has 56%, and his closest rival, Muharrem Ince, is on 29%.
If Mr Erdogan wins more than 50% of the overall vote, he will be declared the winner and avoid the need for a second round of voting.
As well as the presidency, voters are also choosing members of parliament. Mr Erdogan's party is ahead in that poll.