It reports, among others, the news agency AP.
On Saturday night Norwegian time, a mass shooting was reported in Buffalo in the state of New York in the USA.
An 18-year-old man wearing a bulletproof vest started firing a rifle inside a supermarket.
The 18-year-old has not yet been identified, but has been arrested and is in custody with the police. The man must have acted on his own.
Eight deaths were initially reported, but the death toll has risen to ten.
Three injured have also been reported, writes the news agency Reuters.
Investigated as hate crime
Police suspect the mass shooting was racistly motivated.
The suspected perpetrator, who is white, had traveled for several hours to the grocery store where the incident took place.