SAN JOSE -- City firefighters extinguished a suspicious blaze Sunday at Independence High School that may have been connected to other fires at the east side campus.

"We're calling it a suspicious fire," said San Jose fire Capt. Reggie Williams, "because there had been other fires at the school."

Williams did not have the number, dates and nature of the previous fires on hand, but said that a "fire-cause investigator" had told him the blaze on Sunday seemed to fit a familiar pattern.

Firefighters were alerted shortly after noon by an alarm company that had wired the campus to detect fires and smoke. About 24 firefighters arrived within minutes, Williams said, and took less than an hour to extinguish the fire at an administrative building near the center of the sprawling campus. He said the fire did "significant damage" to the building, forcing it to be shut down.

There were no students on campus at the time and no firefighters were injured. Williams said investigators will continue looking into the fires on the campus.

Contact Joe Rodriguez at 408-920-5767.