(AGI) Cairo, July 20 - At least 50 people were killed on Sundayby Israeli shelling in one of the most densely populatedneighbourhoods of Gaza City, pan-Arab broadcaster Al Jazeerareported. Rescue workers were unable to reach the area forseveral hours due to the continuing air strikes. Later, Israeland the Hamas movement agreed to a two hour humanitarian truceat the request of the Red Cross. . .