A 15-year-old youth is in custody after he allegedly stabbed his father in the neck during an argument.
Police hoped to speak to the injured Christchurch man today.
The 42-year-old man lost a lot of blood during the attack, which happened about 5pm on Monday in the family's home in Hornby.
He was stabbed once in the neck.
A knife allegedly used in the attack was recovered by police.