The first message that came to the police just before 2.30 was that there were fights in place located Brenneriveien in Oslo.
"But when we arrived it turned out to be a knife," said Marita Owen, director of Operation Marita, to NTB immediately after the event.
Two criminals were transferred to the hospital. According to the prison guard, two men talk in the mid-1920s.
"Both were identified as" seriously injured "when taken to the hospital, but one of the two men is now out of danger," Chief Intelligence Officer Avind Meyer told Leftenfussen.
According to TV 2, the two men were aware of the emergency services, but one of them lost consciousness on his way to the ambulance.
Three possible victims were insulted
Police information indicates that there is also a third person who was stabbed or injured.
"It is difficult to say why the person was no longer in place when the police arrived, and we are also not sure about the role of the person in the matter.But because the person has to be hurt, it is considered an offense, says Aune.
According to her, it can not be assumed that the victim is also the offender.
Currently, there is no active search of the offender and the offender.
A crowded place
The event took place at Blue Out in Grünerløkka.
"It is now closed off, so the police can carry out the required investigations," Aune said, adding that there may be many witnesses to the incident.
"The police talked to some of them," Aune told Leftenfussen.
"It's night until Sunday, and there were a lot of people in and out of the place.We have enough to catch.
Police are working in place with on-site investigations as well as the fact that criminals at 4.40 were on their way to the scene. Video surveillance will also be reviewed.
The two abusers who were transferred to the hospital could not be appealed.
The police have no control over any possible weapons.