Ballew said officials at Woodrow Wilson Elementary School at 1300 Williams St. called police at 10:15 a.m. today after receiving the threat.
Police searched the school and found no suspicious objects, he said.
As a precaution, Woodrow Wilson and nearby John Muir Middle School, located at 1444 Williams St., were evacuated, Ballew said.
Ballew said students at Woodrow Wilson didn't return to class after the bomb scare because they were scheduled to have a short school day anyway.
