UPDATE: Interstate 41/94 southbound has reopened at the Mitchell Interchange after a semi-truck overturned, according to police.
The Milwaukee County Sheriff's Office is investigating a major crash, causing traffic to be backed up for miles.
Interstate 41/94 southbound is closed at the Mitchell Interchange because of a rollover crash involving a tow truck and a semi-truck, according to police.
The driver of the tow truck has been transported to a local hospital with non-life threatening injuries.
Authorities are redirecting traffic to go west on I-43/894
Police estimate that the backup could last well into rush hour traffic this evening. Find alternate routes here.
This is a breaking news story. Stay with TODAY'S TMJ4 for further updates.
