On 30 September 2003, a Belgian court convicted 18 men for involvement in a terror cell. Nizar Trabelsi was sentenced to 10 years for plotting a suicide attack against the NATO air base at Kleine Brogel. Tarek Maaroufi, of the Tunisian Combat Group, was sentenced to six years in prison for his role in a Brussels-based fake passport ring that supplied fake Belgian passports to the men who assassinated former Afghan Northern Alliance commander Ahmed Shah Massoud two days before the 11 September attacks.