Police are still determining whether a man found covered in blood on a roadside was linked to a violent road rage incident in Onerahi.
A police spokesman said officers were still piecing together what exactly unfolded in the suburb around 1.45pm on Thursday.
According to police, two women had beaten up a male driver after they rear-ended his car on Whangārei Heads Rd.
Up to four police vehicles rushed to the scene where a 22-year-old man was discovered injured on the side of Whangārei Heads Rd, around 600m from the Onerahi Rd turnoff.
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Witnesses described seeing the man lying in a pool of blood while officers hurriedly waved passing traffic through.
The man was transported by ambulance to Whangārei Hospital in a serious condition.
Police were not in a position to confirm whether the male driver was the same man taken to hospital.
The Advocate understands the two women were swiftly located by police shortly after the encounter.