Russia's foreign minister said on Friday the leaders of North Korea and the United States should tone down their bellicose rhetoric and warned that a collapse of a nuclear deal between Iran and world powers would only embolden Pyongyang.
"We resolutely condemn the nuclear and missile adventures of Pyongyang", Lavrov said, "but military hysteria is not just an impasse, it's disaster".
Chinese Foreign Minister Wang Yi put forward a similar proposal, suggesting that "negotiation is the only way out".
He urged the five countries to push all sides to follow the basic principles of the UN Charter, such as equal sovereignty, non-interference in domestic affairs and peaceful settlement of disputes, and to constantly enhance the UN Security Council's primary obligations in maintaining worldwide peace and security.
During his election campaign, Trump had threatened to "tear up" the deal.
The meeting of the Six (Russia, the UK, China, the US, France and Germany) and Iran was held on Wednesday on the sidelines of the UN General Assembly.
"There is no alternative to political and diplomatic ways to resolving situation on Korean peninsula", he added.
The same, he hinted, could not be said of the United States. "Everyone is witnessing with alarm today the newer restrictions by the United States against Iran".
Lavrov was asked whether he saw a link between the crisis in North Korea and Trump's threat to pull out of the 2015 agreement to cap Iran's nuclear program.
"Any unilateral sanctions imposed aside from the sanctions approved by the UN Security Council are illegitimate and undermine the collective nature of the global efforts", Lavrov said. "And they happen to be extraterritorial in nature and they threaten the implementation of the Joint Comprehensive Plan of Action, which became one of the key factors of regional and worldwide stability".
If the Iran nuclear deal falls apart, he said, "then North Korea would say, 'why do I need to negotiate with you if you do not carry out your promises?'"
In his address to the UN, Trump referred to sanctions the United States has levied on the Latin American country and said he was "prepared to take further action". Ultimatums, he added, "never led to anything good". "The dialogue has been going on, it's not easy", Lavrov said.