Shadmani’s pronouncement is the first official confirmation of Tehran’s purchase of the Russian fighters that has long been suspected to be in the works. Kremlin spokesman Dmitry Peskov declined to comment on the issue.

Unlike the treaty with Pyongyang, the pact with Tehran doesn’t envisage mutual assistance in case of aggression. But it does oblige each country not to offer any military or any other aid to an aggressor attacking another party. Moscow and Tehran ...

Nicole Grajewski is a Fellow in the Nuclear Policy Program at the Carnegie Endowment for International Peace and an Associate with the Project on Managing the Atom at the Harvard Kennedy School. She is the author of Russia and Iran: Partners in Defiance From Syria to Ukraine.

Just three days before US President-elect Donald Trump returns to the White House, Russia and Iran have finally signed a “comprehensive partnership agreement,” a deal that had been in the works for months.

Iran has purchased Russian-made Sukhoi-35 fighter jets, a senior Revolutionary Guards commander said on Monday, amid Western concerns about Tehran and Moscow's growing military cooperation.

Amid Western concerns about Tehran and Moscow's growing military cooperation, Iran said it has purchased Russian-made Sukhoi-35 fighter jets.

While Moscow and Tehran have shared warmer relations for decades, a revival of the nations’ allyship occurred when the former invaded Kyiv.

Russian President Vladimir Putin is hosting his Iranian counterpart President Masoud Pezeshkian for the signing of a broad partnership pact

Iran acquiring Russian Su-35 fighter jets would mark a major upgrade of its air force without changing the regional balance of power, analysts believe. A senior Iranian military official told state media on Monday that an unspecified number of the Russian aircraft had been purchased, and appeared to warn Israel against an attack.

Russian President Vladimir Putin and his Iranian counterpart Masoud Pezeshkian deepened military ties between their countries on Friday by signing a 20-year strategic partnership that is likely to worry the West.

Iran and Russia signed a 20-year strategic partnership treaty. It outlines significant economic and military cooperation.

Russia and Iran sign a 20-year strategic partnership agreement to bolster military, political, and economic cooperation amid Western sanctions and escalating tensions.