A woman is due to appear in court accused of attacking a man found with head injuries outside Christchurch's Sumner Surf Lifesaving Club.
The victim remained in hospital in a critical condition on Friday.
The 38-year-old woman was arrested on Friday evening and was charged with assault with intent to cause grievous bodily harm.
She is due to appear in Christchurch District Court on Saturday and more charges are likely.
A 16-year-old has been charged with burglary, and with being an accessory after the fact, and is due to appear in Christchurch Youth Court on Saturday.
Scene examinations are under way at three Christchurch properties and will continue during the weekend.
Police are interested in sightings of a gold-coloured Toyota Vitz car or its occupants in the Ferrymead to Sumner area, particularly in the Sumner beachfront area near Clifton Terrace, during Thursday evening.