 While Bonaparte was in Old Cairo, the city's population began spreading weapons around to one another and fortifying strongpoints, especially at the Al-Azhar Mosque.A French commander, Dominique Dupuy, was killed by the revolting Cairenes, as well as Bonaparte's Aide-de-camp, Joseph Sulkowski.Excited by the sheikhs and imams, the local citizens swore by the Prophet to exterminate all and any Frenchman they met, and all Frenchmen they encountered – at home or in the streets – were mercilessly slaughtered.