Helsingborg District Court said Wednesday that four of the 12 men - all Swedes - were found guilty of ripping off the jersey of Helsingborg striker Jordan Larsson, who was confronted by angry fans, some of them masked. Jordan Larsson was not injured.
The southern Sweden club lost 2-1 to Halmstads in a playoff, sealing their relegation to the Allsvenskan league. Larsson, a former Celtic and Sweden great, stepped down following the defeat.
The incident prompted Interior Minister Anders Ygeman to call for increased security at soccer stadiums.