Russia bought ballistic missiles from Iran

The supply of these ballistic missiles was to begin in January, and the contract for their transportation itself was signed at the end of last year during Russian and Iranian military meetings in both Moscow and Tehran. By now, the Russians were to receive at least 4 tranches of these missiles, but it is not known what order of magnitude we are talking about. Their supplies are made by air and by vessels to operate in the Caspian Sea.