Clovis Unified officials say the call came in around 1:25 p.m. and was later determined to be a hoax.
Reagan Elementary was cleared at 2:48 p.m.
Parents of Regan Elementary students were not allowed on campus, but could pick up their child at the regular pick-up/drop-off locations in the school's parking lot.
According to an email sent to parents, students who walk home were held in the Multipurpose room until picked up by a parent.
All after-school activities at Reagan Elementary were canceled except for the Expanded Learning Club (ELC).
Students attending the Latino Success Conference at Clovis East also stayed until the order was cleared.
In a message to families around 4:09 p.m., Clovis East and Reyburn officials said police cleared the campus and students would be released in phases, 45 minutes later than their usual end-of-day schedule.
After-school activities at those two campuses will continue as scheduled.