An anonymous call about a bomb on campus was made to R.D. White Elementary School around 8:55 a.m., according to Glendale police Sgt. Tom Lorenz.
School officials immediately notified police about the threat and began evacuating students.
The school’s 880 students have been moved to the parking lot of a nearby Whole Foods at Lexington Drive and Glendale Avenue.
Police and fire officials searched the campus but found no device, Lorenz said.
An “all clear” was issued about 11:45 a.m., and authorities turned the building back over to school officials.
Parents were welcome to pick up their children at the store if they bring proper identification.
Monday was the first day of classes after winter break. Security has been stepped up since the Dec. 14 school shooting in Newtown, Connecticut.