Ukrainian President Petro Poroshenko considers it necessary to sign bilateral agreements with the guarantor and signatory states of the Budapest Memorandum to ensure the security of Ukraine.

"We need to draw conclusions from the experience the Budapest Memorandum and compliance with it. We need bilateral agreements with our allies to ensure the security of Ukraine," he said at the 13th annual meeting of the Yalta European Strategy (YES) in Kyiv on Friday.

As reported, Kyiv, accusing Russia of annexing Crimea and further aggression in Donbas, says Moscow violates the Budapest Memorandum and notes no tough response on the part of other signatories.