NEW : Militants ' rocket hits Gaza house , killing Palestinian cousins . NEW : Hamas says it will not negotiate with Israel until the release of all its prisoners and a halt to Israeli attacks on Gaza. Trucks filled with commodities cross into Gaza at three locations . Militants have fired 110 rockets since Wednesday , Israel says .
NEW : Militants ' rocket hits Gaza house , killing Palestinian cousins . NEW : Military says it allowed wounded Palestinian into Israel despite blockade . Trucks filled with commodities cross into Gaza at three locations . Militants have fired 110 rockets since Wednesday , Israel says .