Fire crews raced to the scene of a big rig fire north of downtown Shreveport early Wednesday. It happened just before 3 a.m. near Airport Drive and North Common. Details are limited, but KTBS 3 News has learned that an 18 wheeler next to a building caught fire. The truck is a total loss and there's minor damage to the building. At one point, nearly two dozen units were on the scene. Luckily, nobody was hurt. The fire remains under investigation.