With his eyes fixed on the camera, the 22-year-old suspect poses with various firearms.

The videos were published on Youtube over the weekend.

A day later, the man is suspected of having killed three people and shot several people at a shopping center in Copenhagen.

The 22-year-old's Youtube channel has now been removed with reference to the content violating the guidelines.

The police in Denmark confirm that there have been several videos of the suspect on social media, which they are now looking at more closely.

- It is correct that you can see some of those things in these videos and our suspect is also known in psychiatry, says Søren Thomassen, head of the Copenhagen Police, at a press conference.

According to information to Danish DR, the 22-year-old suspect tried to get in touch with a crisis line shortly before the act, but without success.

Member of the shooting club

The perpetrator is suspected of having acted alone and was arrested by police outside the shopping center after the act.

According to the police, he had a rifle and a knife on him but also had access to a pistol - a weapon that according to the description could correspond to those shown in the videos on Youtube.

The police state that the weapons the detainee was carrying are legal, but that the suspect did not have a permit for them.

According to information to Danish DR, the 22-year-old must have had access to the weapons in his home.

Two Swedes were shot

The people killed in the shooting were a 17-year-old Danish woman, a 17-year-old Danish man and a 47-year-old Russian citizen living in Denmark.

Four people were taken to hospital with serious gunshot wounds, one of them in critical condition.

Two of the gunshot wounded are Danes, 19 and 40 years old, and two are Swedes, 16 and 50 years old.

Another 20 people received minor injuries in connection with the evacuation from the shopping center.

The police theory is that the victims were selected at random.

The 22-year-old man was arrested on Monday on suspicion of murder in three cases and attempted murder in seven cases.

He will be taken to a closed psychiatric ward.