The Islamist-rooted AK Party of Turkish Prime Minister Recep Tayyip Erdogan has won a sweeping victory in general elections.
Unofficial results gave the AK Party about 47% of the vote.
International leaders have congratulated Mr Erdogan and urged him to continue social and political reforms which are required for EU membership.
EUROPEAN COMMISSION PRESIDENT JOSE MANUEL BARROSO
"This [victory] comes at an important moment for the people of Turkey as the country moves forward with political and economic reforms.
Prime Minister Erdogan has given his personal commitment to the sustained movement towards the European Union. I wish him every success with his new mandate."
BRITISH FOREIGN SECRETARY DAVID MILIBAND
"It's very important that across Europe we reach out to the new government in Turkey when it's formed.
A stable and secure political situation in Turkey is massively in our interest and we'll certainly want to be taking forward our links with this very, very important country."
AUSTRIAN FOREIGN MINISTER URSULA PLASSNIK
"We are all interested in having a modern, dynamic, successful Turkey as a partner for the EU.
We expect this government that has a good track record over the past years to continue with even more ambition."
FRENCH FOREIGN AFFAIRS COMMITTEE MEMBER JACQUES MYARD
"French public opinion will look at it very seriously because it is true that the French are very keen to have a secular Turkey and if Mr Erdogan is going to go away from the secular state then it will make things very difficult for Turkey to enter the EU.
So I would say that of course we are not judging in advance, but we will judge on the facts, and if Mr Erdogan is going to be very tough on Islamic rules in Turkey then it will impede certainly Turkey to make progress towards Europe."
SWEDISH FOREIGN MINISTER CARL BILDT
"They have been re-elected on a very strong reform mandate to continue the European reforms they have been pursuing over the last few years and they've been given an impressive mandate by the Turkish electorate."