It is not yet clear how many people were injured or killed in total, but police said the suspect was arrested and the situation was under control.
The man who launched the attack is reported to have been armed and fired arrows at people.
According to police, the man acted alone.
According to the BBC, the man who launched the attack was moving around the city, so police were forced to close several large areas.
Local media reported that the man first launched the attack at the Coop Extra mall in western Kongsberg. According to media reports, four people were killed.
A clash took place between him and the officers before the attacker was arrested.
During the operation, people were instructed to stay at home.
Asked if the attack was considered terrorism, a police spokesman stressed that “it is not yet clear, it is too early to say.”
Police have launched an investigation to find out if this is a terrorist attack.
“It simply came to our notice then. I don’t have words, “Kari Anne Sand, the mayor of the city, told the VG newspaper.
All Norwegian officials were ordered to carry weapons with them after the attack. Normally in Norway, officials are not armed.
Kongsberg is a city 85 kilometers from Oslo.
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