Iran has previously shown that it can and is prepared to attack oil facilities and threaten the maritime transport of oil - through attacks and seized oil tankers in the present. It prompted the US attack on Iranian interests in Iraq to send up oil prices directly.

- As long as we do not have any attacks that remove oil from the market, we will not see any major fluctuations, says energy analyst Samuel Ciszuk at ELS Analysis to SVT.

He continues:

- We will see that the market places a risk cost (premium) on the oil price and it will probably remain for the foreseeable future.

The shipping company: "We carry out transport"

Upwards, every fourth oil barrel comes from the Gulf states - a source that is now under threat. One shipping company that transports that oil is Swedish Stena Bulk, which on Saturday morning had two vessels in the area with upwards of 45 crew members.

Normally, Stena Bulk can have up to five vessels in the increasingly uncertain waters. A shipping company that as late as last summer got a ship seized by the Iranians, oil tanker Stena Impero.

- We have contact with the authorities and decide based on what we should do. Based on what has happened over the past 24 hours, it has not escalated in any way, so we carry out transport as we have done in recent years, says Erik Hånell, CEO of Stena Bulk to SVT.