The man behind the video contacted police after media began reporting on a video in which a masked man threatened to execute a number of people at a shopping centre in Gothenburg.
“It was some sort of a joke. It was never intended to cause a commotion,” police spokesman Stefan Gutafsson told newspaper Svenska Dagbladet.
Gothenburg police launched an investigation on Tuesday after a visitor to the YouTube site alerted them to the video.
In the film, which is of very poor technical quality, a man wearing a hood, dark glasses and a scarf addressed the camera and spoke of his plans for a bloodbath at the Nordstan shopping centre.
“The nasty old men will be executed. October 30th, 12.30, Nordstan. I swear, they’re going to die,” he said.
Stefansson said the police would now discuss the matter with prosecutors before deciding whether to take any further course of action.