If you go back about six hours (It's after that weird speech) you can see one emergency vehicle show up, drive around in the lot, stay there for some time and leave. Now I can see about 5-6 of them.

So my question is: what the hell really is happening? IS there an off chance that the Vatican has it's own law enforcement or security that's doing their own patrols like a high level business would?

Edit: During the day there are also cars parked around where the lights are police lights are seen at night so could this possibly just be security? At my agency when we're doing contracted security for somebody at an event we do the same thing at night. Turning on our lights just so anybody nearby can easily find us.