UN Secretary-General Antonio Guterres has warned that the expiration of the New START treaty represents a “grave moment” for international peace and security.

Axar.az informs, citing UN, he said the world was entering uncharted territory, with no remaining legally binding constraints on the nuclear arsenals of the United States and the Russia – the two countries that together hold the vast majority of the world’s nuclear weapons.

“For the first time in more than half a century, we face a world without any binding limits on the strategic nuclear arsenals” of the two countries, he said.

The New START treaty – formally known as the Treaty on Measures for the Further Reduction and Limitation of Strategic Offensive Arms – was signed in 2010 and entered into force the following year.

It capped each side’s deployed strategic nuclear warheads at 1,550 and imposed limits on delivery systems such as intercontinental ballistic missiles and heavy bombers.

The agreement also included verification measures, including data exchanges, notifications and on-site inspections, designed to reduce mistrust and prevent miscalculation.