UPDATE (WKOW) -- Early Friday morning, The Dane County Sheriff's Office told 27 News a crash at the intersection of County Highway K and US-12 westbound that happened late Thursday night has turned deadly.
Officials say a motorcyclist was hit from behind by a Buick sedan traveling in the westbound lanes of US-12. The motorcyclist died at the hospital.
The names of those involved in the crash haven't been released, but law enforcement officials say they believe alcohol to be a factor in the cause of that crash.
All lanes are now open.
MIDDLETON (WKOW) -- The eastbound lanes of Highway 12 are closed at County K in Middleton after a crash.
A WisDOT email alert about the crash says it happened at 9:23 p.m. Thursday.
At this point, it is unclear what caused the crash.