Police have arrested a man they say fled after an apparent sword attack in south Auckland.

They were called to an address in Paerata this afternoon where they found two women with serious injuries.

A 19-year-old man was found soon after, driving onto the motorway at Papakura.

Police pursued the man to Te Irirangi Drive where they say he drove over a grass median strip and crashed.

He'll appear in court tomorrow facing various charges relating to the assault and driving.