BOULDER CITY (KLAS)— Boulder City Police say children playing on the northeast side of the community discovered, what appears to be, a “very old military-grade explosive.”

The children reportedly brought the device to a nearby house and called police and the fire department. Firefighters requested Las Vegas Fire’s bomb squad who determined the device was an old military device.

Three houses were evacuated and experts from Nellis Air Force Base were called to respond.

The device was taken apart.