At approximately 1:30 AM, Thursday, San Jose FD responded to reports of fire alarm activations at Caroline Davis Middle School, at Edenvale and War Admiral. Initial responding units arrived to find an active fire in a building in the middle of the school. Firefighters knocked the bulk of the fire out in about 10 minutes. The fire was deemed suspicious in origin, and unconfirmed reports of some sort of incendiary device being located at scene. SJFD Arson is en route to handle the investigation.