One or more of the bottles are leaking after the accident, the police told NRK.
The fire brigade and emergency manager continuously assess whether the bottles should be shot.
– When it comes to gas and the like, it may be relevant to shoot holes in one or more of those bottles to get a more controlled liquidation of the gas on the spot, says Vidar Pedersen, operations manager in the Oslo police.
The police have not been able to speak to the driver yet, but the person is not injured.
– We don’t know exactly how it went when it overturned, says Pedersen.
– There is extensive work being done on site, it is a hub in terms of goods traffic in Oslo here. As it is now, all the train lines as well as Østre Aker road are blocked on the spot.
It is not certain how many people are inside the barriers.
Those who have been near the crime scene have received an SMS about the incident. If you are outside the barriers, you do not need to contact the police.
– A provisional safety distance of 300 meters has been set due to a possible danger of explosion. Nothing has been clarified yet, so there is a provisional safety distance, says Kjetil Johanson, duty commander at Oslo, Asker and Bærum 110 central to NRK.
– It is clear that all the time we are faced with a leak, there is great danger potential for people approaching the area, says Pedersen.
The work will continue well into the evening.
The accident occurred in an industrial area.