I was watching the Vatican live cam last night and saw it when it was almost completely dark and saw the lights come back on. The difference was unmistakeable.
About a half hour before the lights came on a large emergency vehicle, like an ambulance, came into the circle with lights flashing and sirens on. I looked away for about a minute to post about it and it was no longer in the frame when I looked back.
Further info on the story developing . . .