Video released by the Las Vegas Metro Police shows the massive response by hazmat, SWAT teams, and the FBI early this morning.
SWAT teams conducted raids at two homes, then focused the investigation on just one house on Sugar Springs Drive.
Inside, agents discovered refrigerators and vials containing unknown liquids.
Hazmat teams worked carefully to properly remove the items and keep the surrounding neighborhood safe.
"I want to make sure those folks that live up there in the Northeast area have a clear understanding that the very large presence likely will remain in this neighborhood for several hours and potentially even days," said Sheriff Kevin McMahill.
The Sheriff says this is an extremely complex situation that requires a tremendous amount of resources.
One person is in custody but their identity has not been released.
Investigators say there is no threat to the public at this time.
Back in 2022, an illegal biolab was found in the city of Reedley.
A code enforcement officer became suspicious when they saw a garden hose sticking out from a building.
Inside, investigators found refrigerators filled with chemicals, medical waste and nearly 1,000 dead and living mice.