Other media had earlier reported 10 people killed in Tonga.
The 1991 census reported 64,428 people speaking the language at home.
An earlier statement by security forces reported six people dead and 83 wounded.
Hospitals in the city reported 25 people dead and 86 wounded.
It was initially reported two people died from the attack, and during the day the death toll increased to seven.
The 2000 census reported 10,787 people living on reservation land.
It has lost significant population since the 1989 census reported 59,000 people.
However, the township reported 277 people, 83 households, and 70 families.
The police reported 80 people killed in two days of violence.
One country, he said, had reported 56 people feared to be missing at the site.