The incident must have occurred in connection with a confrontation between two people.
– We have no control over either suspects or victims, and we therefore do not know if anyone has been injured, says operations leader in the Oslo police district, Gjermund Stokkli, to Dagbladet.
The police have many patrols at the scene and are also searching for those involved by helicopter. Several witnesses are said to have alerted the police at 6:30 p.m. that a person opened fire in the open street and fired several shots at another person.