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.
Spokesman Dmitry Peskov said Russian forces will continue operations, while Moscow renewed its call for the urgent resumption of arms control talks with Washington, Anadolu Agency reported.
Spokesman Dmitry Peskov said there is currently no legal framework in place for the issue, according to TASS.
The Kremlin says Beijing's position on joining arms control discussions with Russia and the United States has not shifted, after Trump proposed trilateral stability talks.
Spokesman Dmitry Peskov said quick results should not be expected in talks on a new arms control deal with Washington.
The US leader also discussed ongoing global concerns touching on Russia, North Korea and Iran with Chinese President Xi Jinping, according to TASS.
Foreign Minister Sergey Lavrov says Moscow is reviewing recent US remarks on space-based weapons, citing a long-standing Russian push for a global ban on placing arms in orbit.
Sergey Ryabkov says US statements on deploying weapons in space cannot affect a strategic stability dialogue that he says does not currently exist.
Russian Foreign Ministry spokeswoman Maria Zakharova said US Air Force statements underscore the need for multilateral negotiations to prevent a space arms race.
Secretary General Nurlan Yermekbayev says the Shanghai Cooperation Organization supports a legally binding international agreement to keep weapons out of space.
Bloc urges negotiations on a legal multilateral instrument to keep space free of weapons and safeguard global security, according to TASS.