On November 27, as Palestinian Authority (PA) President Mahmoud Abbas and Israeli Prime Minister Ehud Olmert met, with the backing of US President George Bush in Annapolis, Maryland, to discuss a possible peace treaty, Israeli troops invaded a number of West Bank cities and attacked the Gaza Strip, killing at least four people. Abbass US-trained Palestinian Security Forces attacked thousands of unarmed demonstrations against the conference in Ramallah, Bethlehem, Nablus, Tulkarem and Hebron.