Turkish President Recep Tayyip Erdogan has narrowly won a referendum to expand presidential powers, which could keep him in office until 2029.
About 55 million people were eligible to vote across 167,000 polling stations, and turnout is said to have been high.
Just over 51 percent of voters have opted for a constitutional change to grant sweeping powers to the president.
The president said the “Yes” camp had secured 25 million votes in the referendum, 1.3 million ahead of “No” votes.
Erdogan supporters say replacing the parliamentary system with an executive presidency would modernise the country.
Opponents have attacked a decision to accept unstamped ballot papers as valid unless proven otherwise.
The main opposition Republican People’s Party is already demanding a recount of 60 percent of the votes.
The president has now called the head of the AK Party he co-founded and other party leaders to congratulate them on the victory, the Anadolu news agency said.
Source: News Now/ Radio New Zealand