North Wales Police has confirmed it was three generations of the same family involved in a plane crash at Caernarfon Airport yesterday morning.
A father, who has not been named, died.
His five-year-old son sustained serious head injuries.
The boy's grandfather, 62, was flying the plane, and remains in a critical condition in hospital.
The family are from the Blackpool area, and were believed to be flying the Piper Cherokee 140 G-ATRR from Blackpool to Caernarfon, before returning to Blackpool.
A post-mortem examination is due to be carried out on Wednesday.
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Some bright spells this afternoon, with outbreaks of rain. Top temperature 15°C.
It's judgement day at the Millennium Stadium as Cardiff Blues take on the Ospreys and the Newport Gwent Dragons face the Scarlets.
Showers expected throughout the day especially in the north. Drier and brighter elsewhere but cooler than in recent days.