An explosion occurred at Northrop Grumman in Promontory early Wednesday morning, April 16, the Box Elder County Sheriff's ...

PROMONTORY, Utah — An explosion destroyed a building inside the Northrop Grumman facility in Box Elder County early Wednesday. No one was injured during the incident, according to the Box Elder County ...

There was an explosion at the Northrop Grumman facility. Deputy Keith Palmer with the Box Elder County Sheriff's Office said the explosion happened at around 7:38 a.m. Initial reports indicated there ...