The exhibition is called "Arctic - while the ice melts" and the tooth has been stolen from its booth.

- On March 20, we discovered that an object was missing from its booth in our Arctic exhibition. We did a police report and the police did a thorough investigation, says Leif Hed, who is head of the department of conservation and security at the museum.

A narval stand is the screwed spear that protrudes at the front of a narval. This tooth was borrowed from the Natural History Museum and is valued at SEK 100,000. The investigation has also been extensive as the theft has been classified as a cultural heritage crime.

- The police investigation has been closed because you could simply find something, which I have understood, says Leif Hed.

Part of the exhibition "The Arctic - while the ice melts" at the Nordic Museum. Photo: Hendrik Zeitler / Nordic Museum

Thefts at the museum are unusual

Leif Hed is not so hopeful when it comes to getting the item back.

- We have just had a dialogue with Natural History and concluded that we cannot do much more. But we keep our eyes open, he says, and continues:

- Now we need to review our routines and sharpen them. We will learn from this.

He says that thefts at the museum are very unusual and that he and the staff have spent a great deal of time trying to find out what happened.

- Of course, this is just the speculation on my part, but I have a hard time seeing one passing a booth and just taking something. You have been more careful. Some kind of knowledge about the object must have existed, he says, and continues:

- This is incredibly serious.