"The President of Ukraine and the Ukrainian Foreign Ministry carried out extensive consultation with our international partners to return the situation to the diplomatic and legal track," Lubkivskii said at a briefing in Kyiv on Friday.
He reminded that the information about the situation was brought to all international organizations, including the UN and the UN Security Council.
"We will continue this work," the diplomat assured.
"The actions of the Russian Federation certainly violate all international principles and standards," Lubkivskii said.
He also added: "This is an act of perfidy. The Ukrainian side lays the responsibility for such disloyalty on the Russian Federation."