Mack Trucks has been evacuated after a fire broke out around 6 p.m. Tuesday.
According to authorities, the call was originally about a truck on fire inside the building, located at 7000 Alburtis Road in Lower Macungie Township.
Kimberly Pupillo, the director of media relations for Mack Trucks, told 69News that a truck caught fire in a test and inspection area, what they call the "final area," not on the assembly line.
Production was halted with the building was evacuated, but it started up again around 8 p.m., according to Pupillo.
According to police scanners, sprinklers kept the fire under control.
According to authorities, crews cleared the scene around 7:30 p.m.