Jurnaliștii de la The Telegraph au afirmat într-un articol că armele teroriștilor ar putea proveni din Bulgaria sau România.
„The AKS-74 Kalashnikovs were the only slightly unusual weapons, he added, because they were not very common in the Balkans – where the AK-47 is much more frequently found. "It was not produced by any Yugoslav country, so was probably made in Bulgaria or Romania.", sustin acestia.