Lavrov: Europe is not authorized to guarantee agreements on Ukraine Sergey Lavrov, the head of the Russian diplomatic service, announced that European countries have demonstrated in their performance that they cannot be trusted when they express their desire to play a role in securing agreements related to Ukraine. He explained: Those guarantors of agreements related to solving problems in Ukraine, that is, in France and Germany, had many opportunities to solve problems between Moscow and Kiev during the last 12 years, but in practice they proved that when they want to fulfill the role of guarantor again, their history and credibility cannot be ignored.