At least two of those individuals were carrying shovels. The authorities should be investigating what where they have been digging. A bomb squad might be a good start.

Could just be "urban explorers". I watch a lot of videos where people explore any tunnel they can find. They also explore abandoned mines, old WW2 and Cold War era bunkers. Pretty interesting the stuff they find.

Still concerning considering the current political climate and the fact that Autopen brought in so many unvetted military age males from God knows where.

https://nitter.net/AwakenedOutlaw/status/2061114759458758927?s=20

Reminds me of an old grade B sci-fi movie from the 50s called "Mole People." Gave my little brother nightmares for weeks.

Maybe the illegals have figured out a new place to set up house? Why pay rent when you can live in a man made cave?