Millerovo Air Base, and the target appears to be the oil storage facility.
In the Russian port city of Azov in Rostov Oblast, Ukraine hit the oil depot which has continued to burn for multiple days.
On June 6, Ukraine struck and caused a large fire at the Novoshakhtinsk oil refinery in Rostov Oblast, Russia.
Based on the videos, the damage appears to be severe.
Additional photos:
The refinery's statistics is available online.
