Police say six juveniles from Manassas accused of placing objects on the Prince William Parkway have now been charged.
Police say lawn chairs, toys and a boulder were placed on the highway, forcing motorists to swerve and causing at least two crashes. Police say two women were injured in an accident March 18th when a car swerved to avoid objects in the road and a second car hit a boulder.
The juveniles face a combined 43 counts of felony destruction of property, littering and trespassing in incidents that date back to October.
Four of the juveniles are 17 years old and two are 16. 
The charges follow the arrests of three 18-year-old high school students last month. Dusty Harrelson, Michael Fuller and Eric Regis are charged with destruction of property, trespassing and littering on the highway. All three suspects are from Manassas.
The incidents began in October.
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