The Diversity Assembly this morning proceeded without incidence, after potential safety concerns were raised that caused police forces to investigate and patrol campus before, during and after the assembly.

Police officers, around six on campus and six surrounding Los Altos’ perimeter, oversaw proceedings this morning to prevent or minimize any potential threat indicated by an anonymous note administration received this Wednesday, Student Resource Officer and Los Altos Police Officer Ryan Langone said. Police conducted surveillance last night and before school today, and a county K-9 team swept the campus for potential bombs before school today, Langone said.

“We just want to make sure we cover all ends and make sure [the students] are in the safest environment that can be provided,” Langone said.

Because the note was anonymous, administration and police could not verify nor rule out the possibility of a threat, leading to uncertainty among students and parents as to whether the assembly would be safe to attend. Mountain View and Los Altos police told administration to proceed with the assembly after evaluating the note, and absences did not significantly increase from previous Fridays before spring break, Assistant Principal Galen Rosenberg said.

The incident comes after an increase in potential safety threats in Bay Area schools. Since the Parkland shooting, Mountain View High School, Palo Alto High School, Cupertino High School and Menlo-Atherton High School have experienced possible safety threats, although none have resulted in on-campus violence.

Staff writers Isabella Borkovic and Noah Tesfaye contributed reporting to this article.