Russia is actively building up its nuclear potential in the temporarily occupied Crimean peninsula, undermining the nuclear-free status of the Ukrainian state, according to Foreign Minister of Ukraine Dmytro Kuleba. He said this during a speech at the high-level segment of the 2021 Conference on Disarmament, as the press service of the MFA reported. The diplomat said Russia's actions undermine the architecture of global security since they violate a number of international documents concerning, in particular, weapons of mass destruction. Russia's hybrid aggression against Ukraine undermines the architecture of global security built on the following major international documents, such as the Treaty on the non-proliferation of nuclear weapons, the Convention on the prohibition of the development, production and stockpiling of bacteriological (biological) and toxic weapons and their destruction, the Convention on the prohibition or limiting the use of specific conventional weapons that may be considered excessively damaging or having an indiscriminate effect, Kuleba said. The minister also drew the attention of the conference participants to threatening and illegal build-up of Russia's nuclear potential in the temporarily occupied Crimea, which undermines the nuclear-weapon-free status of the Ukrainian peninsula. Kuleba called on those present to consider the temporary occupation of the Crimean peninsula and Russia's launch of the armed conflict in certain areas of Donbas as a threat of its military expansion into the east and south of the European continent. The diplomat said Ukraine is ready to contribute to the restoration of the effective work of the conference, in particular, to take an active part in the development of the Treaty banning the production of fissile materials for nuclear weapons or materials for other nuclear explosive devices. He asserted Ukraine's readiness to take part in the creation of a universal document provides effective security guarantees for non-nuclear states parties to the Treaty on the Non-Proliferation of Nuclear Weapons.