Ukrainians abandoned their trenches, creating an gap in the defensive perimiter.
Like standard practice, Ukrainians try to shell whatever they lost.
Be it their own trenches (own taken POWS included) or towns.
the RF Airforce keep launching these bombs at an increasing rate with bigger and bigger versions at Ukrainian positions.
There now have been multiple confirmed video's of the FAB-3000 bombs using these UMPK bomb guidance kits (the last shot in this video is one)