He then fought alongside Osama bin Laden in Afghanistan and in 2000 was the co-founder of a group of Tunisian militants known as the Tunisian Combat Group . He ran a guesthouse for Tunisians in Jalalabad and the men who stayed there were connected to al-Qaeda . He provided the two Tunisian men who killed Ahmad Shah Massoud , leader of the Northern Alliance . Ahmad Shah Massoud was killed by the two men , suicide bombers posing as journalists , two days before the September 11 attacks
September 11 attacks
September 11 attacks
Seifallah Ben Hassine