The Greek Prime Minister has accused Turkey of "bothering" his helicopter with fighter planes when he was traveling to an Independence Day celebration.
Alexis Tsipras said his helicopter had been forced to "low maneuvers" on Monday when Turkish jets entered Greek airspace.
The Prime Minister accused Turkey of "foolish acts that have no meaning".
The Turkish security forces rejected the allegations, claiming that the Jets were carrying out a routine mission.
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"The Greek military has intercepted the forces that have violated the national airspace," said Tsipras in a speech on the small eastern Aegean island of Agathonisi, which was located near the Turkish mainland, on the occasion of the Independence Day.
The national holiday celebrates 1821 the uprising of Greece against the Turkish Ottoman Empire.
"I had the honor of welcoming you here in Agathonisi, and some Turkish Air Force fighters may want to attend the celebration that day," said the Prime Minister.
"What do you think they are doing?"
Mr Tsipras said that he has committed to work with Turkey, but that Greece will always protect its national integrity.
Turkey has denied claims for harassment.
The Turkish state-funded news agency Anadolu quoted the security forces as saying that the planes "are performing their regular mission".
Relations between the two countries have been straining for decades because of territorial disputes in the Aegean.
Mr. Tsipras and Turkish leader Recep Tayyip Erdogan, however, have tried to improve relations. In 2017, Erdogan was the first Turkish leader to visit Greece in 65 years.