The Fremont Police Department on Thursday morning was investigating bomb threats to multiple schools across the city.
Anonymous bomb threats were sent via email to 13 schools in the Fremont Unified School District overnight, police said.
The police department's school resource officer team is working y with the district to conduct security checks at each campus, police said.
The threats are not believed to be credible, police said.
No students are on the campuses as the district is conducting distance learning for all classes and students.