SANTA ANA — Fire personnel continued Thursday, Dec. 7 investigating a massive blaze that a day earlier destroyed a Santa Ana business complex.

More than 90 firefighters, shortly after 9 p.m. Wednesday, responded to the fire in the 1500 block of East Edinger Avenue near Grand Avenue.

The fires crews adopted a defensive posture, focusing on preventing the flames from spreading to adjacent buildings on either side of the two-story complex, said Capt. Larry Kurtz of the Orange County Fire Authority. Firefighters also kept an eye out for embers blown by the windy weather.

No one was injured.

The complex has 15 units, three of which were vacant, Kurtz said. The cause of the fire and damage estimates were not yet known.

Determining how and where the fire started could be a complex process, Kurtz said.

“The larger the building, the longer it takes,” he added. “Investigators will start in the area with the least amount of damage and go to the area with the most damage and try to isolate it (the possible cause of the fire) further.”