CAIRO , Egypt ( CNN ) -- Israeli Foreign Minister Tzipi Livni and Egyptian President Hosni Mubarak met Thursday in Cairo amid escalating cross-border violence between Israel and Hamas . Israeli Foreign Minister Tzipi Livni meets Thursday with Egyptian President Hosni Mubarak in Cairo . The session follows the end of a tenuous 6-month-long cease-fire between the Israeli military and Hamas militants in Gaza . Egypt mediated the first truce and is trying to negotiate an extension despite what Israel says are dozens of rockets fired by Hamas into the Jewish state this week . Livni criticized Hamas after her meeting with Mubarak . `` Hamas needs to understand that Israel 's basic desire to live in a tranquil region does n't mean that Israel is willing to accept ongoing shooting at its population , '' she said , according to the Israeli Foreign Ministry . `` Enough is enough . We can not accept this situation , and the situation will change . '' Egypt expressed concern about a deteriorating humanitarian situation in Gaza , an Israeli Foreign Ministry statement said . The Egyptian Foreign Ministry said this week that it would help countries and organizations deliver aid through Egyptian territory to Palestinians in Gaza . Livni also met with the head of Egyptian intelligence Thursday and is scheduled to talk with the Egyptian foreign minister . Israeli military officials said Hamas militants fired more than 65 rockets into southern Israel on Wednesday . Meanwhile , the Israeli air force said it killed a Hamas militant who was part of a group launching the rockets into Israel . An Israeli police spokesman said no one had been injured in the latest barrage of rocket attacks . But emergency workers with Magen David Adom , Israel 's Red Cross agency , treated 57 people suffering from shock , half of them children , an agency official said , adding that 200 ambulances were standing by in the area . `` I think the circumstances are extremely tragic , that Muslim zealots of Hamas have decided to shatter and ruin the Christmas celebrations of the Christian brothers in the Holy Land , both in the West Bank and of course in Gaza itself , '' Israeli Welfare Minister Isaac Herzog said . `` If things deteriorate further , then of course we 'll have to take necessary action , which will be very painful , '' Herzog said , adding that civilians had gathered in shelters in southern Israel to try to stay safe amid the rocket attacks . Asked about the possibility of Israel coming up with a new strategy , Herzog responded , `` The new strategy could be , of course , an all-out conflict against Hamas , which is a possibility that voices in Israel are calling for . We are trying to show restraint . '' Hamas is a Palestinian Islamic fundamentalist organization whose military wing , Izzedine al Qassam , has admitted responsibility for terrorist attacks against Israeli civilians as well as attacks against the Israeli military . Israel and the U.S. State Department consider Hamas a terrorist organization , though it also operates an extensive social services network in the territories . Mark Regev , spokesman for Israeli Prime Minister Ehud Olmert , said , `` Our position is clear : We will answer quiet with quiet , and we will answer attacks with measures designed to protect our people . '' Olmert has threatened to respond to the ongoing attacks . The truce between the Hamas government in Gaza and Israel expired Friday . Under the Egyptian-brokered deal , Hamas agreed to end militant attacks on Israel from Gaza , and Israel agreed to halt raids inside the territory and ease its blockade on humanitarian goods . In reality , the truce had started breaking down two months ago . Rocket attacks by militants became more frequent , and Israel resumed airstrikes inside Gaza . `` We really appreciate the Egyptian efforts . ... , '' Herzog said . `` The Egyptians have tried endlessly and tirelessly in the past few weeks to bring Hamas back to cease-fire mode . '' Olmert said Sunday that Israel will `` take the necessary measures '' to respond to the rocket attacks and `` will know when to respond correctly and with the necessary responsibility . '' `` A responsible government is neither eager for battle , nor does it shy away from it , '' he said .
Israeli Foreign Minister Tzipi Livni , Egyptian President Hosni Mubarak hold talks . Meeting follows end of cease-fire between Israel and Hamas militants in Gaza . - : The U.S. State Department says it is "concerned" about the situation in Gaza. Hamas militants fired 65-plus rockets into southern Israel on Wednesday . Israeli prime minister has threatened to respond to ongoing attacks .