Probably also worth noting that an air defence missile used in its air defence role is supposed to detonate on or near its target (in the air), or after a miss. They are absolutely not supposed to crash into the ground and detonate their warhead. For that to happen the missile either needs to malfunction or be configured in ground attack mode.

Of course a misconfiguration by Ukrainian operators is possible, and so is a malfunction. I have no conclusive information as yet.

I'm just saying though, if it was a Ukrainian missile, that's a lot of coincidences.