Before the ground attack, Israel allowed some 300 Palestinians who hold dual citizenship to leave the heavily bombed region of over 1 million residents Friday after pleas from other governments that they be permitted to leave.
"There is no place to hide," Palestinian-American Jawahir Haggi told ABC News. "You want to go to a house, do you want to go and hide? You find bombs and the Israelians [sic]. You go to another house, you find bomb and Israelians [sic]. There is no place to hide."
According to U.N. reports, some aid is getting through, but not enough to cope with the massive demands the conflict has placed on food resources, hospitals and utilities.
Many civilians have not survived long enough to feel the aid shortage.
The U.N. estimated Friday that a quarter of the Palestinians killed in air strikes were civilians.
"They are supposed to destroy just the Hamas, but people in their homes are dying too," Hajji, a 14-year-old U.S. citizen, told the AP.
On Monday, Israeli Foreign Minister Tzipi Livni told reporters the military was targetting only Hamas and that Hamas "hides among civilians."
Thursday, Israeli air strikes killed senior Hamas leader Nizar Rayyan. His four wives and 11 children were also killed by the 2,000 pound bomb.
The ground invasion began on a day of protest throughout Europe against Israel's offensive in Gaza -- with demostrators turning out in Paris, Berlin, Athens, Rome and 18 cities in Great Britain.
Up to 12,000 people gathered in London's Trafalgar Square, where protestors expressed anger at what they saw as a disproportionate response by the Israelis, ABC News Radio's Tom Rivers reported.
"Killing 100 Arabs for every Jew that is killed is not proportionate," Former London Mayor Ken Livingstone told the crowd. "It is a war crime."
Livingstone said he hoped the demonstration would send a powerful message to British Prime Minister Gordon Brown, and he said he described the silence of most Western governments to the Israeli attacks as obscene.
ABC News' Simon McGregor-Wood, Mimi Daher, Tom Rivers and Tom McCarthy contributed to this report.