Dozens of Russian military personnel are being trained in Iran to use the Fath-360 close-range ballistic missile system, two European intelligence sources told Reuters, adding that they expected the imminent delivery of hundreds of the satellite-guided weapons to Russia for its war in Ukraine.

Russian defense ministry representatives are believed to have signed a contract on Dec. 13 in Tehran with Iranian officials for the Fath-360 and another ballistic missile system built by Iran's government-owned Aerospace Industries Organization (AIO) called the Ababil, according to the intelligence officials, who requested anonymity in order to discuss sensitive matters.

Citing multiple confidential intelligence sources, the officials said that Russian personnel have visited Iran to learn how to operate the Fath-360 defense system, which launches missiles with a maximum range of 120 km (75 miles) and a warhead of 150 kg. One of the sources said that that "the only next possible" step after training would be actual delivery of the missiles to Russia.