The man, who wishes to remain anonymous, says that he became worried and quickly left the scene. By chance, he ran into a police officer just after the find and the police then followed him back.
"The police took it very seriously right away," he says.
"I'm a bit observant"
The man goes on to say that it was clear that someone had put a lot of effort into taping the object, which he describes as a cardboard box. Lars Hedelin, spokesperson for the police, confirms that the object was found on a bicycle.
Although Saturday's incident, in which another suspicious object was found in Örebro, was fresh in his memory, the man believes he had reacted.
"I'm a bit observant and this stood out so much that I reacted," he says.
Javascript is disabled
Javascript must be enabled to play video
Learn more about browser support
Watch the National Bomb Squad arrive at the scene. Photo: SVT