Fire crews were called to the campus at 820 Fourth Ave. shortly before 7 a.m., and the fire in an office area near the cafeteria had burned itself out before firefighters arrived, Chula Vista Deputy Fire Chief Jim Garcia said.
Garcia said it appeared someone broke a window near the cafeteria this morning and vandalized the school. It was unclear what time the vandalism took place, but it appeared to be related to the fire, he said.
Investigators were working to determine if the fire was accidental or incendiary in nature, Garcia said.
Chula Vista police were investigating the vandalism, Garcia said.