It is not yet possible to say how many people are injured or killed in the explosion.
The building that houses, among other things, the Prime Minister's office is hit by the explosion.
NTB confirmed that Prime Minister Jens Stoltenberg is the safety.
Paramedics treat more injuries in the street outside the government building.
Many people are bleeding in the street outside, hit by broken glass that fell from the broken windows.
- You can not go through here, because there are still two bombs we do not know where is, police on site to Aftenposten.no reporters.
Trying to get an overview
- All we know is that there is a kind of explosion. We are on the way out there, are the short and hasty message Aftenposten.no get the police in Oslo for the call just after half past four.
In a press release from the Oslo police are the following:
There has been a powerful explosion in the government quarter. The police was notified of this at 1526 this afternoon.
All rescue personnel are on site and the police are trying to get an overview of the situation. Police District staff is called.
Several injured
Both windows in the government quarter and VG building is blown out, according to Aftenposten's report on the site.
- The police tell us that we need to get us off, we need to get off. There may be more bombs, tells reporters.
They say that there is broken glass everywhere, the burning of buildings.
- I see people with blood on his face and hands, telling Aftenposten reporter.
Eyewitnesses said, according to NTB, it may look like a car outside a high block has been the basis for the explosion.
Entire facades blown out
Our reporter passed Market Street and there is full chaos people running around bewildered. Several places are a fire alarm.
You can smell the sulfur fumes.
Shop Denim Gallery has received throughout the facade blown out.
Rods of increasing areas
A huge røyksy rose several hundred feet in the air. Large parts of Oslo heard a huge explosion which led to Darren Hayes, the Aftenposten keeps house literally shook when the explosion took place at five at half four in the afternoon.
Press The wave was so powerful that the windows all the way down to the National Agencies building was blown out.
Vaterland tunnel is closed.
The area between Stortorvet, Hammersborg and Storgata is blocked off. Young town square is already closed, because the police fear that new explosions can occur.
There have been several unconfirmed reports that it also should have been a violent explosion in Stortingsta, just below the Parliament, according to NTB.
It is still unclear what caused the explosion.
The building that houses, among other things, the Prime Minister's office is hit by the explosion.
NTB confirmed that Prime Minister Jens Stoltenberg is the safety.
Paramedics treat more injuries in the street outside the government building.
Many people are bleeding in the street outside, hit by broken glass that fell from the broken windows.
- You can not go through here, because there are still two bombs we do not know where is, police on site to Aftenposten.no reporters.
Trying to get an overview
- All we know is that there is a kind of explosion. We are on the way out there, are the short and hasty message Aftenposten.no get the police in Oslo for the call just after half past four.
In a press release from the Oslo police are the following:
There has been a powerful explosion in the government quarter. The police was notified of this at 1526 this afternoon.
All rescue personnel are on site and the police are trying to get an overview of the situation. Police District staff is called.
Several injured
Both windows in the government quarter and VG building is blown out, according to Aftenposten's report on the site.
- The police tell us that we need to get us off, we need to get off. There may be more bombs, tells reporters.
They say that there is broken glass everywhere, the burning of buildings.
- I see people with blood on his face and hands, telling Aftenposten reporter.
Eyewitnesses said, according to NTB, it may look like a car outside a high block has been the basis for the explosion.
Entire facades blown out
Our reporter passed Market Street and there is full chaos people running around bewildered. Several places are a fire alarm.
You can smell the sulfur fumes.
Shop Denim Gallery has received throughout the facade blown out.
Rods of increasing areas
A huge røyksy rose several hundred feet in the air. Large parts of Oslo heard a huge explosion which led to Darren Hayes, the Aftenposten keeps house literally shook when the explosion took place at five at half four in the afternoon.
Press The wave was so powerful that the windows all the way down to the National Agencies building was blown out.
Vaterland tunnel is closed.
The area between Stortorvet, Hammersborg and Storgata is blocked off. Young town square is already closed, because the police fear that new explosions can occur.
There have been several unconfirmed reports that it also should have been a violent explosion in Stortingsta, just below the Parliament, according to NTB.
It is still unclear what caused the explosion.