ANKARA, March 25 (Xinhua) -- Turkish jets were not involved in any harassment of a helicopter carrying Greek Prime Minister in the Aegean Sea, state-run Anadolu Agency quoted security sources as saying on Monday.

Greek Prime Minister Alexis Tsipras said in a speech that Turkish jets buzzed his helicopter as he was flying on Monday to the Agathonisi island, a few miles from Turkey's Mediterranean coast.

"Turkish jets forced my helicopter to reduce altitude until Greek jets intercepted them," Tsipras said.