Investigation
Will this be treated as a "serious incident", to be investigated (and if so by whom - Irish AAIU, or Greeks/Lithuanians?).
Was it an EI-registered a/c?
Would be very interesting to see some hard facts published ASAP. I know others have touched on this, but crew decision to divert to Minsk is certainly interesting when one considers much greater proximity to Vilnius, I would like to see ATC transcripts, know facts of when did MiG appear, did crew see it, etc. etc.
Altogether a very shocking event, and I for one am surprised to see EU a/c still crossing Belorussian airspace some hours later.