Antonio Guterres called on nuclear-armed states to return to dialogue in order to prevent any use of nuclear weapons and reduce their role in security policy.
Iran's deputy foreign minister Kazem Gharibabadi questioned how the world can discuss disarmament while overlooking Israel's nuclear arsenal.
Foreign Minister Choe Son Hui made the comments while addressing the outcome of a trilateral meeting between the top diplomats of the United States, Japan and South Korea, state media reported.
A classified evaluation shared with Congress has prompted pushback from lawmakers over a proposed US-Saudi civil nuclear cooperation agreement, according to the Washington Post via Anadolu Agency.
A senior North Korean diplomat criticized recent trilateral talks between the United States, South Korea and Japan while asserting Pyongyang will retain nuclear weapons indefinitely.
Analyst Ruslan Pankratov says there remains a significant gap between Lithuania's parliament repealing a nuclear-restriction law and any actual deployment of nuclear arms.
A North Korean defense official cited threats from the US and South Korea as justification for potential use of weapons of mass destruction.
Pyongyang accused the International Atomic Energy Agency of applying "double standards" after the body passed a resolution criticizing its nuclear program.
Russian president names strengthening of the nuclear triad as one of the country's "unconditional priorities," according to state news agency TASS.
Moscow cites Finland's move to join a French nuclear deterrence initiative as a recent example of what it calls troubling Western behavior involving nuclear arms
Kim Kang Il said Pyongyang will "firmly defend peace and stability" on the Korean Peninsula, according to TASS.