I don't know about the veracity of tactical nuke, but even though it has been reported as a drone attack, many question that premise. Speculation is that it was a missile of some sort, and highly likely NATO supplied.

Regardless, people keep questioning whether current trajectory will lead to WW III when the reality is that it has already started for some time (by design) and Russia will undoubtedly bring the conflict to U.S. territory if even indirect American assistance leads to damage within Russia; the degrees of separation are not really relevant to their nationality existential interests if long-range missiles are supplied, as repeatedly stated throughout the war and emphasized in the last few weeks.