Turkey President

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.

The prosecutors in the western city of Mainz said they had not found sufficient evidence to continue the inquiry against Jan Boehmermann.

In March, Boehmermann recited a satirical poem on TV which made sexual references to Mr Erdogan.

Mr Erdogan then filed a complaint alleging that he had been insulted.

In a statement on Tuesday, the prosecutors said that "criminal actions could not be proven with the necessary certainty".