McFarland Police say one of the drivers involved in a collision on Sunday suffered a medical problem and may have been unconscious prior to the crash.
Two of the six people hurt had to be taken by MedFlight to UW Hospital, with serious injuries.
The accident happened around 9:30 a.m. at the intersection of Siggelkow Road and Erling Avenue. One vehicle rear ended the other, at a high rate of speed. Both vehicles were heavily damaged.