By Shereen Siewert

Investigators are seeking witnesses to a two-vehicle crash last week involving a semi and a passenger vehicle that left four people critically injured.

The crash was reported just after 7 a.m. Friday, Jan. 24 on Hwy. 45 near Ledge Rock Road in Waupaca County, according to the Wisconsin State Patrol.

Police say the semi was headed northbound and collided head-on with a southbound Ford Fusion.

All four occupants inside the car suffered life threatening injuries and were transported to Theda Medical Center.

Their names and current conditions have not been released.

The driver of the semi was not injured.

Anyone who witnessed the crash is urged to contact the State Patrol’s Northeast Region Post at 920-929-3700.

Top photo: Wisconsin State Patrol Facebook photo