While diplomats are talking, Greece and Turkey's Coast Guard units find themselves staring each other down in the seas between them, with Turkish vessels reportedly harassing their Greek counterparts.

The latest incident was off the island of Lesbos on June 14, where thousands of refugees and migrants who came from their homelands through Turkey are being held in a detention camp while seeking asylum.

Two days earlier, said Kathimerini, a Turkish patrol boat made dangerous maneuvers in close proximity to a Greek Coast Guard vessel that was trying to rescue migrants off the coast of Lesbos.

The island is the prime destination for the refugees and migrants, mainly from Syria, Afghanistan and sub-Saharan Africa, Turkey allowing human traffickers to keep sending them during an essentially-suspended 2016 swap deal with the European Union, which closed its doors to them.

In the earlier incident, the two vessels were reportedly involved in a minor collision in which the Turkish boat suffered minor damage but no injuries were reported although there have been worries there could be an accidental conflict erupting over such near clashes in the seas.