Somali President Abdullahi Yusuf Ahmed becomes country 's prime minister on Thursday . PM refuses to resign ; president backs him ; Yusuf appoints new PM . Kenya threatens sanctions on Yusuf , claiming he 's supporting development efforts . Somali has been without effective central government since 1991 .
Somali president Abdullahi Yusuf Ahmed fired country 's prime minister on Sunday . PM refuses to leave ; parliament backs him ; Yusuf appoints new PM . Kenya threatens sanctions on Yusuf , says he 's undermining peace efforts . Somali has been without effective central government since 1991 .