After one of Sweden’s most expensive trials and criminal investigations ever, 16 of 20 defendants received prison sentences, two were ordered into juvenile detention, and two were found not guilty.
They were accused of crimes including murder, kidnapping and extortion.
An appeal is expected in the case, after a verdict the criminologist Jerzy Sarnecki told news agency TT was a victory for society and the Swedish justice system.
"If the verdict holds in the court of appeals, the people of Södertälje can be happy. They have experienced the network's activity as terror," Sarnecki said.