SVT's review of the nitrous oxide market on social media shows that there is a connection to heavier drugs.

A picture that the police confirms when SVT shows some examples of nitrous oxide sellers who have offered us drugs.

In drug circles

According to Emil Jansson, group leader at the police's investigation unit in Västmanland, however, it is difficult for the police to get access to nitrous oxide sellers, who outwardly sell a legal product.

- It is the legislator's task to decide whether nitrous oxide should be illegal, but since it occurs so much in drug circles, there is a connection, that is what I see, he says.

In larger cities such as Stockholm, nitrous oxide is often sold outside pubs.

In Västerås it is a different pattern.

It is more common for nitrous oxide to be driven out and used at private events or outdoors.

In the clip, Emiil Jansson tells how the police work against drug ringing that takes place via social media.