Representatives from the three nations, China, Iran, and Russia met in Beijing on Friday to discuss their nuclear ambitions.

Iran says it would consider negotiations with the United States if talks were confined to concerns about the militarization of the country’s nuclear program.

Iran’s Supreme Leader Ayatollah Ali Khamenei has rejected the idea of holding negotiations with the United States over a nuclear deal, as a letter arrived from US President Donald Trump calling for such talks.

China and Russia joined Iran in denouncing US sanctions and backed efforts to restore a landmark nuclear deal with Tehran that President Donald Trump abandoned in his first term and now wants to replace.

China, Iran and Russia called for diplomacy over “pressure and threats” and an end to “all illegal unilateral sanctions” following talks on Tehran’s nuclear program Friday in Beijing, Chinese state media said.