UPDATE (WKOW) -- All lanes are back open on I-90/94 eastbound near Portage following a semi-truck fire.
Wisconsin State Patrol said it was a small battery fire and that no one was hurt.
COLUMBIA COUNTY (WKOW) -- A semi-truck fire on I-90/94 eastbound near Portage has shut down the left shoulder of the highway, according to the Wisconsin Department of Transportation.
The fire was first reported at 4:30 a.m. Tuesday at mile marker 102.
The Wisconsin State Patrol is responding to the scene.
This is a developing story.