The US government is working on a secret underground tunnel system in preparation for the devastating third world war - wild statements have been rained on social media.
Strange new footage of one of these mysterious phenomena has emerged from Cleveland, Ohio, USA, showing video footage from a security camera.
Residents say they have become accustomed to such underground activity, but this time, many got scared when pieces of their houses began to fall off.
Homeowners say mysterious sounds come from underground, with floorboards shaking, but no earthquakes or other natural phenomena have been reported.
So, now this event has a conspiracy theory that it is a secret government underground program.
Some have even compared it to the 2005 hit movie War of the Worlds, where an invasion comes after aliens have been preparing underground for hundreds of years.
Conspiracy theorists find documentary evidence that these incidents were first recorded in the west of the country and have now spread to the east.
They were first reported in Arizona and since then these incidents have occurred in Texas, Alabama, Georgia and Rhode Island.
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The video was uploaded yesterday on the secureteam10 YouTube channel.
And the audience was quick to share their thoughts.
One comment read, "I definitely believe they are creating hidden tunnels underground."
Another added, "Something strange is going on here, and whatever it is, it will be coming soon."
And the third simply said, "Preparing for WW3."