A WARNBRO man will face court after a violent road rage incident on Safety Bay Road Baldivis.
A police spokesman said it happened on Monday just after 3pm.
A Holden was travelling south on Safety Bay Road when the occupants noticed a Ford being driven erratically and the two cars were involved in an accident.
The drivers of both vehicles and a passenger in the Holden became involved in a fight when the driver of the Ford pulled a knife out and slashed the passengers arm.
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The 36-year-old was charged with threats to injure, unlawful wounding and being armed to cause fear.
He is due to appear in Rockingham Magistrates Court on December 28.