Wouldn't be the first time I assumed wrong, but I'm going to wait for better sourcing than the Kyiv Post for this particular story.
They have an existential rational for blaming Russia, as well as an obligation to feed the propaganda narrative for their ongoing war. That's not a criticism as that's what is required of them at this moment, but it's an acknowledgement of why I will wait for additional reporting that isn't sourced from Ukraine, or a single Hungarian journalist on Twitter.