The business, in operation since 1987, also sold commercial fireworks in a nearby building, which was untouched.
It is illegal in New York to sell fireworks.
The son, who they said was named Ian, often sold fireworks to neighborhood children.
Most places that sell fireworks in Iceland make their own rules about age of buyers; usually it is around 16.
He had begun to sell fireworks because he wanted to buy his five brothers Christmas presents.
Prosecutors have said they intend to bring criminal charges against those who illegally stored or sold fireworks.
Because of sovereignty rights, the Suquamish could sell fireworks that were illegal in other places.
No state or local permit is needed now to sell fireworks in Seabrook.
At the site there are stores selling fireworks in which they are beside one another.
So how do Trading Standards make sure that people aren't selling fireworks to those under age?