MARATHON CITY, Wis. (WAOW) -- Marathon City firefighters say a semi trailer started on fire while driving down County Rd. N in the town of Cassel.
The call came in around 11:20.
When crews arrived, the trailer was fully engulfed in flames.
The fire was put out in less than a half hour.
County Rd. N is blocked off near the area of the fire.
The trailer was carrying whey powder.
The driver of the semi was unharmed
The cause is under investigation.