The fighting in Gaza has entered a third week, defying international outrage and calls for a ceasefire.Overnight, Israeli planes and tanks hit targets said to be rocket launch sites, weapons caches and tunnels used for smuggling arms. Eight members of one family were reported killed when a tank shell hit their home in Jabaliya. Both Israel and Hamas rejected a UN resolution calling for a ceasefire. Israel’s outgoing Prime Minister Ehud Olmert said it was unworkable, while Hamas complained they had not been consulted. Medical officials in Gaza say nearly 800 Palestinians have died in the fighting, more than a third of them children. Israel says ten soldiers have died, as well as three civilians hit by Hamas rockets fired over the border.