sentences:  United Nations Security Council Resolution 66
  
  United Nations Security Council Resolution 66, adopted on December 29, 1948, in response to a report by the Acting Mediator regarding hostilities which broke out in southern Palestine on December 22 despite UN calls for a cease-fire, the Council demanded the immediate implementation of United Nations Security Council Resolution 61.The Resolution instructs the Acting Mediator to facilitate the complete supervision of the truce by the UN observers.