UPDATE Wednesday 5/23/2018 12:56 p.m.
Local 5 sister station WISC in Madison is reporting a semi and a school bus were involved in the accident previously reported.
Reports are that multiple people were taken via Med Flight to a local hospital.
Wisconsin State Patrol is saying four people were injured.
The bus was carrying students form a Milwaukee-area private school according to officials.
ORIGINAL STORY Wednesday 5/23/2018 11:59 a.m.
Emergency crews are responding to reports of a school bus crash in Columbia County.
All northbound lanes on I39-90 and 94 at mile marker 123 are closed.
The Wisconsin Department of Transportation says the crash was reported at 10:15 Wednesday morning.
It is not clear if any students were on the bus or if there are any injuries.
Stick with Local 5 for any new updates.