The boy had been looking for the keys to his father’s weapons cabinet and took out two small-bore rifles and a shotgun during the night, hiding them under his bed, according to Svenska Dagbladet.
In the morning, the boy’s paternal grandmother came to take care of the boy and his three siblings while their father went out fishing. After his father had left, the boy took one of the small-bore rifles to go out and shoot birds in the backyard, the report said.
While on the lawn, the boy tripped and an accidental shot went off. The shot flew into the house through an open patio door, hitting his 65-year-old paternal grandmother, who was in the kitchen. The woman died on the spot. It is not yet clear who alerted emergency services, the report said.
“The family is obviously shocked and they were immediately cared for by a crisis team including, among others, a minister on duty,” police spokeswoman Pia Goksöyr said in the afternoon.
“The boy is with his family because he is not suspected of any crime,” she added.
Police have launched a preliminary manslaughter investigation.
“However, it is only so that we can fence off the site and make seizures,” said Goksöyr.