But a representative from the International Committees of the Red Cross and Red Crescent in Gaza, William Schomburg, got an audio message out. Various global aid agencies said they could not contact their staff in Gaza. 'A humanitarian catastrophe is unfolding in front of our eyes,' U.N. Palestinians say nowhere is safe, with bombs also smashing homes in the south of the densely populated territory. In calling on Gazans to move south, Israel said Hamas was hiding under civilian buildings, especially in the north. Though there was no indication of an invasion en masse, Israel said troops and armour sent into Gaza on Friday night were still in the field, focusing on infrastructure including the extensive tunnel network built by Hamas. Israel's chief military spokesperson declined to say whether Israel was behind the telecommunications blackout in Gaza but said it would do what it needed to protect its forces. Without mobile phones, no one could call ambulances, and emergency services were short of fuel anyway, he said. 'God help anyone under the rubble,' said one Gaza journalist, who spent a terrifying night in a building stairway watching 'belts of fire' as bombs fell and Israeli forces appeared to exchange fire with Palestinian fighters. Their plight got worse from Friday night when phone and internet services were cut - followed by heavy bombing through the night. With many buildings reduced to rubble and shelter hard to find, Gazans are short of food, water, fuel and medicines.

Rules of phase 10