Wail and Waleed al-Shehri disappeared after going to Medina, calling their father just once; in the conversation, the brothers were vague about when they would return. Both had expressed interest in joining the jihad in Chechnya, though may have been diverted to Afghanistan. Before disappearing, the Shehri brothers went to Al-Seqley Mosque to swear an oath and commitment to jihad, as did Ahmed al-Nami and Saeed al-Ghamdi. Wail presided over the ceremony, dubbing himself "Abu Mossaeb al-Janubi" after one of Muhammad's companions.