There were reports of an armed man seen at schools around Pahrump, just 60 miles from the famous Las Vegas strip, according to local media.
Police are on the scene and the area is being searched.
Multiple schools have been reported to have been placed on lockdown.
One local wrote: “My cousin attends this school and is safe. They are still on lock down. So scary.”
Others reported pupils “couldn’t leave campus” while police were deployed on the scene.
Intial reports suggested shots had been fired but these were confirmed to be inaccurate by police.
The Nye County Sheriff’s Office said in a statement: “All Nye County and Town of Pahrump government office have been closed in Pahrump as precautionary measures.
“This includes the courthouse on Basin Avenue.”
The reports come as Nevada remains on edge after at least 58 people were killed and another 515 injured in the deadliest mass shooting in modern US history.
Gunman Stephen Paddock, 64, fired on the Route 91 Harvest country music festival from his room on the 32nd floor of the Mandalay Bay hotel and casino over looking the event in the Las Vegas strip.
Jason Aldean, the country music singer who was performing when the shooting took place, described the scene as “beyond horrific” while images from the tourist attraction showed bloodied festival goers fleeing the venue.
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