Police say a man called Edgemont Elementary two different times.
Shortly after 9:15 a.m. a lockdown was announced over the intercom. Parents say students were huddled into the corner of classrooms for up to 45 minutes.
Teachers and students remained in their classrooms not knowing the reason for the lockdown.
Emily Clark's children are Edgemont Elementary students. She talked with ABC 4 shortly after the lockdown was lifted. "They did read aloud. (For) one teacher, the computer was close enough that they could watch a movie," she said.
Firefighters searched the roof as officers and K9 units searched the building and surrounding area for explosives.
Officers are working with a phone company to trace the call made by the man who made the threat.
The lock down was lifted around 11:00 a.m. to the relief of parents, teachers and students.
Students remained in their classrooms during this bomb threat because studies reveal its the safest place, according to Provo School District Spokesman Greg Hudnall.