Östersundsposten was the first to tell about the incident.
The object had been found outdoors by private individuals who called the police, RLC officer Mathias Borin tells SVT.
The police in turn contacted the national bomb squad in Stockholm to take care of the play.
- It was actually found a few days ago but the bomb squad could not come then.
They had to get up today with the military, they came with a Black hawk helicopter, he says.
The bomb squad judged that the object was sharp, that is, could detonate.
It is probably an old air defense piece, and it is now rendered harmless.
- Yes, they blew it up in a field, says Mathias Borin.
The bomb squad ended its operation at seven o'clock on Saturday night.