JOHANNESBURG – Seven people have died in a horrific crash on the N3 freeway in Free State on Monday.The Road Traffic Management Corporation says the accident happened about 10km north of Villiers, in the Grootvlei area.It says a minibus taxi overturned, killing 7 people.Five people have been injured.It’s not yet known what caused the crash.Motorists are being urged to be vigilant on the roads.