Martonyi went on to reference the Budapest Memorandum on Security Assurances in 1994, signed by Russia, the United States and the United Kingdom. This agreement assures against threats or use of force against Ukraine in return for the country’s entry into the Treaty on the Non-Proliferation of Nuclear Weapons.

“All parties must be clear on the gravity of the situation,” Martonyi said, as he called for “the greatest possible caution” and “avoiding of all forms of provocation.”