درنة
According to BBC security correspondent Frank Gardner, an al-Qaeda operative claimed the men had spent two months training with militants in Derna, Libya. On 20 March, Tunisian Security Minister Rafik Chelly announced that Labidi and Khachnaoui had received weapons training in Libya from an unspecified group prior to carrying out the attack. According to authorities, they managed to slip past the border to Libya undetected in December.