Ukrainian President Zelenskyy announced that Ukrainian forces have used a new weapon system called “Palyanytsya”, a missile-drone. It is possible that this new weapon struck the ammunition warehouse in Voronezh region last night, instead of the Neptun missile. The target is more than 110km from the Ukrainian border.
The specifics of the new weapon are not disclosed, but my guess is that it is a drone propelled by a jet engine.