Cyprus on Sunday denounced Turkey as a “pirate state” that flouts international law as Turkey’s bid to drill for natural gas in waters where Cyprus has economic rights rekindled tensions over energy reserves in the eastern Mediterranean.

Cyprus said Turkey was now attempting to drill inside an exploration area, or block, south of the ethnically split Mediterranean island nation that’s already licensed to energy companies Eni of Italy and Total of France.

This would be Turkey’s fourth such drilling effort since last July when it dispatched a pair or warship-escorted drill ships to the island’s west and east. It would also mark the second time a Turkish ship was drilling in a block licensed to Eni and Total.

Overall, the two energy companies hold licenses to carry out a hydrocarbons search in seven of Cyprus’ 13 blocks off its south coast. Other companies holding such licenses include ExxonMobil and partner Qatar Petroleum, as well as Texas-based Noble Energy and Israeli partner Delek.

Cyprus said despite emerging energy-based partnerships among the countries in the eastern Mediterranean, Turkey has opted to “go down a path of international illegality” of its own accord. It said Turkey has “provocatively ignored” repeated European Union calls to stop its illegal activities.

The EU has also adopted a mechanism to sanction individuals or companies involved in illegal drilling off Cyprus.

Read more: AP