Police are investigating an incident in Preston Docks that the fire service believe could be arson.
Crews from Penwortham and Preston were called to a fire at an office building in Watery Lane at around 4.12am this morning (May 10).
It is believed the fire was started deliberately and police have been informed.
A statement from Lancashire Fire & Rescue Service said: “The office building comprised two floors and a basement.
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“There was a small fire on the first floor and two fire engines and crews, from Penwortham and Preston, responded. Firefighters equipped with breathing apparatus used a hosereel jet to put the fire out and used a portable fan to extract the smoke.
“There were no casualties. The fire is believed to have been started deliberately and police have been notified of the suspected arson.”