Cypriot waters housing a continental shelf offered to international companies for energy exploration have been claimed by Turkey.

Government spokesman Nicos Christodoulides told the state radio that Turkey handed a letter to the United Nations Secretary General claiming that one block which Cyprus included in its exclusive economic zone under the U.N. Law of the Sea actually falls within its own exclusive economic zone and wants the rights to other blocks.

Turkey is among a few countries which have not endorsed the U.N. Law of the Sea and said it will decide for itself which waters it wants, again encroaching on Cyprus after previously sending in a warship and energy research vessel.

Those were withdrawn only after Cypriot President Nicos Anastasiades broke off talks to reunify the island that’s been divided since an unlawful Turkish invasion in 1974, which resulted in the occupation of the northern third of the island.

Emboldened by the European Union giving him concessions so he won’t flood the bloc with refugees, Turkish President Recep Tayyip Erdogan is becoming more aggressive and Turkey has regularly been violating Greek air space and waters as well.

When Christodoulides was asked whether the claims of Turkey on parts of the Cypriot EEZ  or any military action may break off the unity talks again he said they weren’t related, Xinhua reported.

“The Republic of Cyprus has nothing to worry about, its actions are based on international law, on the Convention of the Law of the Sea signed in 1982,” he said.