Police are looking for person who allegedly presented a firearm at a fellow motorist in Oamaru over a driving complaint.
The armed offenders squad was notified of the incident, which occurred about 9pm on Friday, a police spokeswoman said.
''Police are attending an incident in Oamaru where a motorist . .. has reported a person in another vehicle presenting a firearm to the victim after a driving complaint,'' the spokeswoman said in a statement.
It is understood police were tracking the vehicle on State Highway 1 after it left Oamaru and drove towards Dunedin.
No further details were available.