At about 5:30 EEST, a Donetsk telegram channel shared a video showing a fire in Russian-occupied Horlivka accompanied by sounds of detonation:
Ammunition dump on fire in occupied Horlivka, Donetsk Oblast
— Euromaidan Press (@EuromaidanPress) August 21, 2022
Here is the footage of the same fire in Horlivka filmed from a closer angle:
— English Luhansk (@loogunda) August 21, 2022
Multiple minor detonations of the ammunition imply that it was another Russian military facility that was likely hit by the Ukrainian forces earlier this morning.