The police started, according to Norrköping Newspapers, at lunchtime on Saturday to block off an area adjacent to a car company in the Butängen area in Norrköping.
The police could not identify what the object was so the National Bomb Squad was called in for security reasons. The bomb shelter was in place shortly before 7 p.m.
Another car company in the area was exposed to shelling on Saturday night and on Thursday there was a shooting at a villa.