Iran has supplied Russia with weapons worth 4 billion dollars, including missiles and drones, starting from 2021, in the context of the invasion of Ukraine.

According to a Western official quoted by Bloomberg, Iran has supplied Russia with weapons worth approximately 4 billion dollars since 2021, including Fath-360 ballistic missiles and Shahed-136 kamikaze drones. Deliveries began before Russia's invasion of Ukraine, and contracts were signed in October 2021 and early 2023.

Although Iran has denied supplying drones, evidence suggests shipments via the Caspian Sea. The relationship between Iran and Russia has strengthened following Western sanctions, but it is unclear what support Iran receives in return. Russia has not intervened in Iran's conflict with Israel, which has drawn criticism from some American officials.