Photo from UNIAN

"Three years ago, Russia the aggressor undermined all foundations of both global and regional order, launching the illegal and cynical annexation of Crimea and aggression against the peaceful country, Ukraine, in the east," Poroshenko said.

"Such a policy by the Kremlin is a challenge not only to the sovereignty, territorial integrity and independence of our state, it is also a challenge to global security, to Turkey, and all the countries of the Black Sea region," said the president.

Read alsoStoltenberg says Donbas fighting reason NATO strengthening eastern flanks"I am very grateful to Turkey and its leadership for their firm and unshakable position in supporting our sovereignty and territorial integrity. My friend and also a great friend of Ukraine, President of Turkey Recep Tayyip Erdogan, has reiterated this position, including during the 25th BSEC (Organization of the Black Sea Economic Cooperation) summit held recently in Istanbul," Poroshenko said.