Footage taken by Arthur Litinskii in the Ukraine, during the civil riots, show a group of protesters being fired upon by police and/or security forces believed to be inside the building.
If you look carefully, you will see the gunfire come from the lower left window panels. It is possible the bullet may have been a ricochet off the concrete.
The building housed a division of the Berkat / Secret Police in in City of Khmelnytskyi in central Ukraine.
One woman died at the scene, and another man shows his injuries from being shot in the stomach. It is believed the death toll has risen to over twenty-five in the space of a few days.