Police said a male victim from Fatumu has been hospitalised while his brother was arrested after a fight they both were injured on Tuesday.
Police said an altercation had led to the older brother, 20, allegedly attacking and injuring his young brother, 18, with a blunt object, Tonga Daily News reported.
The young brother allegedly stabbed him with a knife.
The older brother was taken to hospital, the report said.
Police investigation continues.