Warehouse fire snarls traffic in downtown Winston-Salem

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WINSTON-SALEM, N.C. -- Crews are on the scene of a warehouse fire in downtown Winston-Salem. 

Authorities told FOX8's Brent Campbell construction workers spotted the fire shortly before 10 a.m. at an old warehouse behind Wake Forest Biotech Place between 7th and 5th Street. 

No injuries were reported, however 26 people were evacuated from the building. 

Officials said the building is where INMAR is moving their company headquarters.  It has recently been undergoing renovations. 

The fire was primarily in the building's duct work.  Its cause is still being determined. 

Several streets, including 7th, 6th and 5th Street, were blocked for about an hour while firefighters worked to control the blaze.

Due to the size of the building, nine engine companies were required to get the fire under control.