Students were sent home due to the investigation. The department tweeted that the entire school was searched and there was no threat to the public.
At this time they aren't saying what caused the school to be evacuated and students to be sent home early.
No further details were immediately available.
#CunhaSchool has been searched. There is no threat to the public. We are working with School Officials and will provide more information shortly.— San Mateo County S.O (@SMCSheriff) September 19, 2018