UPDATED: Six people were injured, four seriously, Saturday night in a multi-car crash on Highway 100, several miles west of Washington.

The 7:26 p.m. crash happened on Highway 100 new Newport Road, according to the Missouri Highway Patrol.

The four people who were seriously were not wearing safety belts, according to the preliminary patrol report. 

An eastbound 2003 Ford Mustang driven by Melissa S. Carron, 20, St. Louis, was passing another vehicle and the driver lost control when she swerved to avoid a westbbound Volkswagen Jetta driven by Mary M. Abegg, 46, St. Louis, the patrol said. 

The Carron car ran off the right side of road, continued on and collided with a Dodge Ram pickup truck driven by Derek A.Vaughn, 33, Hermann. Carron's car then ran off the right side of the road and overturned, and the Vaughn truck ran off the left side.

Nicholas J.Rucker, 38, New Haven,  driving  westbound in 2005 Kia, was forced to swerve to avoid the Carron car and ran off the right side of the road, the patrol said. 

Carron and three passengers, Patrick M. Carron, 21, St. Louis Justin M. Eplin, 19, New Haven, and Laura L. Weatherly, 19, New Haven, were seriously injured. None of them were wearing safety belts. 

Vaughn and a passenger, 10-year-old Hunter A. Vaughn, New Haven, sustained minor and moderate injuries. They were were wearing safety belts. 

Rucker and Abegg were wearing  seat belts. They were not injured, according to the patrol.