Police in Motala said the 35-year-old man, whose name was not released, has repeatedly been seen riding on and inside garbage trucks, The Local.se reported Friday.
"At one point he was lying hidden in a Dumpster full of trash that they were about to empty," police spokesman Egon Persson said. "Sometimes he hangs on at the back of the truck, without the driver's knowledge. Sometimes he climbs up on the roof of the vehicle."
Trash collectors said they are on the lookout for the man.
"He likes to lie on the roof of the truck and film the men at work," foreman Per Andersson said. He said the man was lucky some workers discovered him inside a garbage truck before he was seriously injured.
Andersson said the man does not seem to be motivated by environmental or political issues.
"No, this is a sick man. He has an enormous interest in rubbish and our work," he said.