DAVIS, Calif. (KTXL) — Holmes Junior High and Davis Senior High were closed on Thursday morning, according to the Davis Joint Unified School District, after the district received a ‘threatening email’ on Wednesday.

The Davis Police Department announced around 9:15 a.m. on Thursday that the two schools are safe for students to return to. Students are being asked to return to class at 10:15 a.m.

Two 14-year-old’s were found to be responsible for the email and have been detained, according to police, and there are no longer any present threats to either schools.

Police said that both teens are from Davis and attend one of the districts other junior high schools.

According to the district, “out of an abundance of caution” the two school sites were closed on Thursday until the district and the Davis Police Department determined the campuses safe for students to return to.

All other district school sites remained open as no other threats were made beyond the junior high and senior high, according to the district.

“The safety of our students and staff is our first priority, and we take all threats to our school community very seriously,” the district said in a news release. “The Davis Police Department is actively investigating the threats and will be present at both campuses tomorrow morning.”