Fire crews knocked down a fire in a commercial building in Carpinteria early Wednesday.

Carpinteria-Summerland Fire Protection District Chief Dan Stefano told Noozhawk that crews initially responded at around 2:16 a.m. for a smoke investigation on the 1100 block of Mark Avenue.

Fire Captain Brian Bull and arriving crews found smoke coming out of a warehouse upon arrival.

The incident was upgraded to a working structure fire and additional crews were called in, including from the Montecito Fire Department, the Santa Barbara City Fire Department and Ventura County Fire Department.

Crews forced entry and found a fire in a “corner area that was being controlled with activated fire sprinklers,” Stefano said.

They knocked it down and extinguished it with the assistance of the sprinklers, Stefano said.

There were no people inside the building at the time of the fire, and Carpinteria-Summerland Battalion Chief Noah Tunney confirmed there were no injuries.

“Due to the potential of the fire extending deeper into the hidden wall areas of the structure, extensive salvage and overhaul operations were conducted, including the use of our CSFD Drone (piloted by Fire Marshal LoMonaco) which assisted in gathering intelligence throughout the incident,” Stefano added.

Crews left the scene at around 6:45 a.m.

The cause of the fire was under investigation.