Several people have been killed and others injured in a bow and arrow attack in Norway

Authorities say the incident occurred in the town of Kongsberg – south-west of the nation’s capital, Oslo.

The suspect has been arrested, and it’s believed he was acting alone.

Media reports say the attacker opened fire at a Coop Extra supermarket on Kongsberg’s west side. Residents were ordered to stay indoors.

The suspect moved through the town when carrying out the attacks, and police have cordoned off several large areas.

Local media is reporting that the attacker opened fire from inside a supermarket… and it remains unclear the exact number of people who have been killed.

Public broadcaster NRK reports at least five killed.

“The man has been apprehended, from the information we now have, this person carried out these actions alone,” police chief Oeyvind Aas told reporters.

“Several people have been injured and several are dead,” Aas said. He declined to comment on the number of casualties.

Police say the number of casualties is unclear, as is the motive for the attack.

The injured have been taken for treatment at nearby hospitals.