The Vollsmose terrorists were three men convicted of attempted terrorism in Denmark in 2007–2008. Nine men were initially arrested by Danish police in the Vollsmose neighbourhood of Odense on 5 September 2006, but most were later released without charges, including a police mole who played a role in the investigation and trial. Four men were charged with attempted terrorism, three of whom were convicted. According to Danish police, the group had been under investigation for quite a while.