Turkish Defence Minister Hulusi Akar made clear that Turkey will not sit and watch without doing anything, while others drill for oil and gas.
Turkish Vice President Fuat Oktay says Greek Cypriot side is abusing its EU membership to stop Turkey's drilling activities in the eastern Mediterranean.
Ankara and the EU are at loggerheads over who has the right to explore newly-discovered gas fields.
The Turkish government is standing firm on its oil and gas exploration in the Eastern Mediterranean as Greece and Greek-administered Cyprus call on the European Union to take action against Turkey.
Maronite Christians used to live in a handful of villages in the north of the island, but most left when fighting started between Turkish and Greek Cypriots and the island was partitioned in 1974.
The fifth Mediterranean conference, hosted in the divided capital of Nicosia, in Cyprus, produced a joint declaration which favoured Greek Cypriot political positions, angering Turkey.
The opening of the Dherynia border post in the east and the Lefka crossing in the northwest is the first such step to end the 44-year frozen conflict between Turkish Cypriots and Greek Cypriots in eight years.
Turkey reminds Greece of a 1995 parliamentary declaration in which Ankara authorised action, not excluding military action, to safeguard Turkish interests in the Aegean.
Turkey's first drilling ship is all set to become operational in the Mediterranean Sea and another ship will follow soon, according to Turkish Energy and Resources Minister Fatih Donmez.
Turkey’s Foreign Ministry blames the attitude of the Greek Cypriot administration for the repeated failure of negotiations with Turkish Cypriots.
Turkey's criticism comes after Ankara deployed navy vessels on Friday to stop a rig belonging to the Italian energy firm ENI as it headed toward an area southeast of Cyprus.
Cypriots are voting Sunday to choose a president who could break a cycle of failure in talks to reunify the ethnically split island-nation — and deliver the benefits of a rebounding economy to citizens still recovering from a severe economic crisis.
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