“We don’t know exactly what kind of bomb it is but I think we are talking about a SC50 with 21-25 kilos of TNT in it,” Wiggo Korsvik, a staff officer at Norwegian Joint HQ, told Hamar Arbeiderblad.
According to Korsvik, it's quite likely that the bomb was a remnant of a German offensive aimed at the royals near the start of the war.
The discovery was made along Highway 3 near Åsta and a stretch of the road was shut off to traffic before responding police officers determined there was no danger of the undetonated bomb suddenly exploding.
Korsvik said it was lucky for the construction workers that the bomb was German-made.
“Fortunately it is German because they can take a real beating it definitely got one from the excavator. Such a thing can be scary if it had hit the bomb in the wrong place,” he said.
Korsvik told Hamar Arbeiderblad that there are still hundreds of incidents every year in which bombs and ammunition from World War 2 pop up in Norway.