It says an undetermined number of American citizens remain missing and unaccounted for. On Sunday, an official said that number was fluid and had ranged from between six to 12. It is not clear whether the missing had been taken hostage, were killed or are in hiding.

The State Department is in touch with families “and providing all appropriate consular assistance,” said spokesman Matthew Miller.

At least 800 civilians and Israeli soldiers have died since the terrorists struck early on Saturday morning.