Athens, Greece – The Greek government welcomed a Turkish survey vessel’s return to port Sunday from a disputed area of the Eastern Mediterranean that has been at the heart of a summer stand-off between Greece and Turkey over energy rights.

The Oruc Reis research ship returned to near the southern Turkish port of Antalya for the first time in weeks after Turkey announced in July that it was dispatching a vessel to work in waters that Greece claims are its exclusive jurisdiction.

“This is a positive signal. We will see how this develops to make a proper assessment,″ Greek government spokesman Stelios Petsas told TV channel Skai.

The dispute over potential oil and gas reserves has triggered a military build-up in the eastern Mediterranean. Nominal NATO allies Turkey and Greece both dispatched warships to the area where the Oruc Reis was engaged in seismic research and conducted military exercises to assert their claims.

NATO intervened, organizing talks between the two countries’ militaries to prevent a potential armed conflict.