TOWN OF WALWORTH, Wis. -

Two people suffered critical injuries in a two-vehicle crash Sunday in Walworth County.

The Walworth County Sheriff's Office said the crash occurred at about 5 p.m. at the intersection of U.S. Highway 14/67 and Lakeville Road in the Town of Walworth.

Sheriff's officials said the preliminary investigation revealed that a Chevy van towing a Smokercraft fishing boat and trailer was traveling southbound on Highway 14.

A Chevy Cavalier was eastbound on Highway 67 and failed to yield after stopping at the stop sign, sheriff's officials said.

Sheriff's officials said the van was unable to avoid the collision and struck the driver's side of the Cavalier.

A passenger in the van was transported by ambulance with minor injuries. The driver of the van wasn't injured.

The driver of the Cavalier, Shawn E. Cummings, 29, of Crystal Lake, Ill., was flown by Flight for Life to Janesville Hospital with critical injuries.

A passenger in the Cavalier, Lia M. Cummings, 7, of Crystal Lake, Ill., was flown by Flight for Life to Children's Hospital in Milwaukee with critical injuries.

Another passenger in the Cavalier, a 22-year-old woman from Glendale Heights, Ill., was transported by ambulance with minor injuries.

Authorities said all the occupants of both vehicles were wearing seat belts.

The road was shut down for three hours after the crash.

The Walworth County Crash Investigation Team was called to the scene. The crash remains under investigation.