UP : Midnight - to - dawn curfew established nationwide , a general says . NEW : The whereabouts of President Guillaume Tell are not immediately known . U.N. Secretary-General Ban Ki-moon called on all groups to end the violence , asking that they `` exercise calm and restraint . '' Streets quiet as lawmakers consider extending the President 's rule .
UP : Midnight - to - dawn curfew established nationwide , a general says . NEW : The whereabouts of President Guillaume Tell are not immediately known . Streets quiet as lawmakers consider extending the President 's rule .