You can't blame yourself. Who really wants to lead a lunch on Satsu anyway.... Werewolf is not that tasty from what I have heard
Ok first reaction to seeing Razamith. End side of the train - possible vigilante attempting to hit a late scum addition to the train, but we don't have a vigilante role. So possibly SK or Werewolves trying to get revenge.
As we see wasn't successful.
We can guarantee at least one kill was stopped/blocked. At least one, possible more.
Or it was a double tap maybe. But highly unlikely.