 However, an-Nasir Muhammad's senior aide, Qawsun, held real power and ultimately imprisoned and executed Abu Bakr and had an-Nasir Muhammad's infant son, al-Ashraf Kujuk, appointed in his stead.By January 1342, however, Qawsun and Kujuk were toppled, and the latter's half-brother, an-Nasir Ahmad of al-Karak, was declared sultan.Ahmad relocated to al-Karak and left a deputy to rule on his behalf in Cairo.