Russians are reportedly flying MIg fighter jets into Iran as we speak and have been for many days.
It is quite reasonable to suppose that, as they have in the past, they will put islamic Regime ID on them but it will be Russian pilots at the stick.
Iranian Air force sources tell me the Migs are very hard to handle or pilot even for the Russian pilots.
Nevertheless if evolving as speculated, this shows the Russian position in the unrolling events and their willingness to take a stance. I wish the USA would also take a strong stance