BATON ROUGE - An apartment complex was declared a total loss Thursday morning after a fire that investigators believe was intentionally set. 

When Baton Rouge fire crews arrived to the apartments on Longfellow Drive, they found flames engulfing the roof of the building. They searched the building but quickly had to shift to a defensive strategy to keep the fire from spreading.

When investigators were able to sweep the area, they found the destructive fire was likely set intentionally. 

Only one apartment was occupied by four individuals. The rest of the building was vacant. 

A spokesperson for the Baton Rouge Fire Department said it was unclear whether the individuals had permission to be in the building or not. 

Anyone with information about the fire that happened on Longfellow Drive is asked to contact BRFD investigators at (225) 389-2050.