NEW YORK: Russia on Friday prevented the adoption of a joint declaration following a four-week UN conference on a nuclear disarmament treaty, with Moscow denouncing what it said were “political” aspects of the text.

The Nuclear Non-Proliferation Treaty (NPT), which 191 signatories review every five years, aims to prevent the spread of nuclear weapons, promote complete disarmament and promote cooperation in the peaceful use of nuclear energy.

The nations had been gathered at UN headquarters in New York since Aug 1, participating in almost month-long negotiations, including a final session that was postponed for several hours on Friday.

In the end, the conference’s president, Gustavo Zlauvinen of Argentina, said it was “not in a position to achieve an agreement” after Russia took issue with the text.

Russian representative Igor Vishnevetsky said the draft final text, which was more than 30 pages long, lacked “balance”.

“Our delegation has one key objection on some paragraphs which are blatantly political in nature,” he said, adding Russia was not the only country to take issue with the text.

According to sources close to the negotiations, Russia was opposed in particular to paragraphs concerning the Ukrainian nuclear power plant in Zaporizhzhia, which is occupied by the Russian military.

The latest draft text had expressed “grave concern” over military activities around Ukrainian power plants, including Zapor­izhzhia, as well as over Ukraine’s loss of control of such sites and the negative impact on safety.

Neutral and non-nuclear Austria condemned on Saturday the attitude at the talks of major powers, and not just Russia.

“While three-quarters of the 191 signatory states support credible progress for nuclear disarmament, it is mainly the nuclear-armed states, and above all Russia, which resisted,” the government in Vienna said in a statement.

It noted that contrary to treaty commitments, Britain, China, France, Russia and the United States are improving or expanding their stock of nuclear weapons.

“During the negotiations in New York, there was no perceptible willingness to meet the previously unfulfilled contractual obligations.”

The signatories discussed a number of other hot-button topics during the conference, including Iran’s nuclear program and North Korean nuclear tests.

At the last review conference in 2015, the parties were also unable to reach an agreement on substantive issues.

At the conference opening, UN Secretary-General Antonio Guterres warned that the world faces “a nuclear danger not seen since the height of the Cold War.”