Firefighters battled a large commercial fire in Los Alamitos early Tuesday morning.

The blaze at the one-story commercial building was reported around 5:30 a.m. in the 10800 block of Kyle Street.

Arriving firefighters found heavy fire burning through the roof and quickly went into a defensive operation to protect surrounding buildings, Orange County Fire Authority Capt. Doran said.

The Fire Authority ended up sending 38 firefighting units to battle the three-alarm blaze.

Aerial video from Sky5 showed flames burning through the roof of the building with thick, dark smoke billowing over the area.

Firefighters from all directions were seen trying to douse the flames.

It’s unclear which business caught fire or if anyone was inside the building when the fire started.

Officials said there were no reported firefighter or civilian injuries.

No further details were immediately available.