Police in Thessaloniki have arrested a total of 21 people who they suspect of being members of two gangs: One is alleged to have blackmailed business owners, while the other is thought to have been engaged in human trafficking. The first gang is alleged to have been run from prison by a 38-year-old inmate who had been imprisoned for murder and extortion. The gang is thought to have had 19 members, three of whom are already in prison. A police officer from Thessaloniki is among those of suspected of being part of the gang. He has been suspended from duty pending an internal investigation. The second gang is believed to have consisted of at least six members, all of whom have been arrested.