https://youtu.be/Y8kdneBU_3Q?si=cr07TeMnxJTG-3TM&t=17
No significant damage.
The Ukrainans apparently lost control of the drones and they wound up there. My pet theory is that Russian EW jammed the control signals and guided the GPS jamming walking them to Constanta. I'll admit, if it was intentional (it seems so) it's pretty damn' impressive work from Russian EW.