Here, the explosive charge at Birger Jarl nightclub explodes

- We want tips, if anyone recognizes this person, please feel free to hear, says Jonas Eronen, the police spokesperson.

It was the night of Monday two weeks ago that the police alarm center received calls about a loud bang. It turned out that a little exploded in a parking lot at the back of Birger Jarl nightclub.

- We are still waiting for analysis answers, so far we only know that it was not a hand grenade but something else, says Jonas Eronen.

The clip above comes from a surveillance camera near the nightclub. The pictures show how the assailant runs, puts something on the ground and flies on a bicycle in the direction of the Academic Hospital.

- And a couple of minutes after that it melts. He is masked, but I still think that the person can be identified on, for example, the movement pattern, says Jonas Eronen.

According to him, it is often difficult to investigate blasting.

- On the one hand, a lot of evidence has disappeared in the explosion itself, and on the other hand, few people want to talk to the police once we have started calling in a suspect.

Anyone who has tips to hand over to the police about the blast outside Birger Jarl can call 114 14 - or go to the police website.