Napa police reported that a woman's body was found at Irene M. Snow Elementary School on Sunday.
Police are investigating the death and said her identity has not been confirmed. Officers said there is no threat to public safety.
Napa Valley Unified School District administrators told police that the school was not open during or before the time the death occurred.
The school will likely be open on Monday, according to police.
Anyone with information about the death is asked to contact Detective Garrett Wade at firstname.lastname@example.org or (707) 257-9509.