Why would Russia use an out dated S300 system when they switched to S400’s and are now modernizing to S500’s. As well, they are anti missile system not designed to be used as missile for ground targets, there pretty week for that purpose. That is either an obvious error by the journalist or it Ukraine bombing more citizens as they are the only one in the country to use them, leftovers from soviet era. Russia is in no shortage of missiles or precision glide bombs.
The Russians have been using S300 missiles in their ground attack mode for months now. It is exactly because they have lots of them in stock and not much need for them as SAMs. They are expendable.