` ` Three or four members of Al Qaeda in the Arabian Peninsula , '' took part , one source says . Western intelligence services suspect they may have been sent to carry out the attack . They were later transferred to northern Mali , where the trail appears to have gone cold .
`` Three or four members of al Qaeda in the Arabian Peninsula , '' took part , one source says . Western intelligence services suspect they may have been sent to carry out the attack . They were later traced to northern Mali , where the trail appears to have gone cold .