A woman escaping clashes flees to a U.N. school, but is forced to flee again on Saturday to a hospital after the school is shelled. A shell shocked, wounded teenager walks into an abandoned apartment and collapses. They are among the 200,000 Palestinians that according to a Gaza rights group were forced to flee their homes to escape Israel's three-week-long campaign of bombing and ground fighting. Even if the shelling stops under an Egyptian-brokered cease-fire, thousands will still have been forced out. The problem is, there's nowhere safe to go in tiny Gaza _a sliver of land 10 kilometers wide and 40 kilometers long. «Where to go?» panted Nabila Kilani as she held her infant daughter in the backyard of the Kamal Adwan hospital, where she had just fled a U.N. school that came under fire as hundreds of people sheltered there. Gazans are trapped in their small enclave: bordering Egypt and Israel will not let them enter except in exceptional circumstances. «Innocent children and innocent men and women are dying here in Gaza hour by hour by hour. What are these poor people to do? Where are they to go now? They're asking me, 'Where should we go?' I don't know where they can go,» said Gaza-based senior U.N. official John Ging at the school. It was the third U.N. school to be hit by Israeli fire and in a fourth incident on Jan. 6, shells landed near a school to kill about 40 people. New York-based Human Rights Watch has said Israel's use of artillery that can damage a wide area violates international law because of the harm it can cause to civilians.