A 26-year-old man was arrested after he attacked his 60-year-old father and a brother in Fasi on Saturday.
The father was severely injured and he was in hospital in a critical condition.
The assailant’s brother was injured while he tried to intervene and defended their father, Tonga Broadcasting Commission (TBC) reported.
TBC said the accused was known to Police and he has been treated in Vaiola hospital for his psychiatric issues.
He has been charged with grievous bodily harm and remains in custody to be appeared in court this week.
Police investigation continues.
