Shots were fired at police officers during a major police chase across Auckland's southern and northern motorways today.

Police said offenders had since been arrested in Rodney and no members of the public or police were injured.

The police were not looking for anyone else in relation to the chase.

Earlier, a witness who didn't want to be named, had seen an old car with its back window smashed out, go past him near Waitoki, closely followed by around 20 police cars.

He said the police were armed and had the dog squad in attendance too.

Another caller said he saw the Armed Offenders Squad heading north towards where the incident was unfolding.

A witness in Kumeu said six police cars were speeding north towards Waimaukau.

Members of the public witnessed a major incident unfolding on the Northern Motorway in Auckland around 12.20pm.

A witness told the Herald she watched 26 police cars pass Corinthian Drive at 12.20pm with sirens and lights flashing.

An ambulance was also headed in the same direction, she said.

Police said the incident involved a fleeing driver, which began on the Southern Motorway.

The vehicle got off the motorway in Rodney, police said.

- More to come