Shortly after 15.30 on Monday, a loud, dull bang was heard in the Stockholm area.
"There are several conversations that a dull bang has been heard," says Eva Nilsson, the Stockholm Police Press Spokesperson.
According to the police, many calls have come in from Saltsjö-Duvnäs and the Nacka area.
- They describe the sound as a dull slap in the ground, an explosion or an earthquake. It is difficult to locate the sound, says Eva Nilsson.
According to the police, it is currently unclear what it is that may have caused the noise.
- No one has seen anything visible. We head out into the area to find out more, concludes Eva Nilsson.