Turkish President Recep Tayyip Erdogan expressed his anger over the report published by the OSCE observer mission on the constitutional referendum, Anadolu reports.
However, opposition parties said the exercise was marred by irregularities, adding that they would challenge its result.
Turkish President Recep Tayyip Erdogan isn't publicly anxious about losing European Union access.
Donald Trump reportedly rushed to congratulate President Recep Tayyip Erdogan of Turkey after he successfully forced through a referendum that has resulted in an unprecedented concentration of powers in his hands.
"The crusader mentality in the West and its servants at home have attacked us", he told a crowd as he arrived at Ankara airport, in response to the vote monitors' assessment.
The "Yes" camp won 51.41 percent in Sunday's referendum, according to complete results released by election authorities.More news: 'Pretty Little Liars': Everything you need to know for tonight's premiere
But in a country that is deeply divided, "where it's nearly half and half for and against Erdogan, if you even have allegations of voter fraud, whether or not it happened, his legitimacy will be completely and constantly questioned by that half that does not vote for him". "We neither see, hear, nor acknowledge the political reports you'll prepare".
State Department spokesperson Mark Toner and human rights watchdogs echoed those concerns, prompting Erdoğan to warn the OSCE to "know your place".
According to observers from the OSCE and human rights body the Council of Europe, the procedures used in the referendum campaign and during the vote in Turkey did not meet worldwide standards. The French vote for a new president begins next Sunday. Everyone and all sections - and the main opposition party in particular- must show respect.
The changes to Turkey's government could keep Erdogan - the leading political figure there since 2003 - in power until 2029. The entire executive branch will thus be under the direct power of the president. "It's wrong to say something after the nation has spoken", he said.
Meanwhile, German Foreign Minister Sigmar Gabriel said that despite a landmark referendum in Turkey that will grant sweeping new powers to the nation's president, Turkey should not leave North Atlantic Treaty Organisation.