By IBRAHIM BARZAK and AMY TEIBEL, Associated Press Writers
GAZA CITY, Gaza Strip – Israel declared a unilateral cease-fire in the Gaza Strip on Sunday meant to end three devastating weeks of war against Hamas militants, but just hours later militants fired salvos of rockets into southern Israel.
The violence that threatened the hours-old truce came even as a slew of foreign leaders headed for Egypt to try to cement the cease-fire.
No one was injured by the 10 rockets that struck southern Israel. But shortly afterward, Gaza security officials in the northern Gaza town of Beit Hanoun reported an airstrike that wounded a woman and her child. After the first volley hit the rocket-scarred town of Sderot, Israeli aircraft hit the rocket squad that fired it, the military said.
Hamas rulers have said they would not respect any truce until Israel pulls out of Gaza and in another incident after the truce took hold, militants fired small arms at an infantry patrol, which directed artillery and aircraft to strike back, the military said.
"Israel's decision allows it to respond and renew fire at our enemies, the different terror organizations in the Gaza Strip, as long as they continue attacking," Israeli Prime Minister Ehud Olmert said at the start of the weekly Cabinet session.
"This morning some of them continued their fire, provoking what we had warned of," Olmert said. "This cease-fire is fragile and we must examine it minute by minute, hour by hour."
Government spokesman Mark Regev would not say what level of violence would provoke Israel to call off the cease-fire.
In Gaza, people loaded vans and donkey carts with mattresses and began venturing back to their homes to see what was left standing after the punishing air and ground assault the tiny seaside territory endured. Bulldozers began shoving aside rubble in Gaza City, the territory's biggest population center, to clear a path for cars while medical workers sifting through mounds of concrete discovered dozens of bodies in the debris.
The cease-fire went into effect at 2 a.m. Sunday local time after three weeks of fighting that killed some 1,200 Palestinians, about half of them civilians, according to Palestinian and United Nations officials. At least 13 Israelis also died, according to the government.
Israel stopped its offensive before reaching a long-term solution to the problem of arms smuggling into Gaza, one of the war's declared aims. And Israel's insistence on keeping soldiers in Gaza raised the prospect of a stalemate with the territory's rulers.
The cease-fire went into effect just days ahead of President-elect Barack Obama's inauguration Tuesday. Outgoing Secretary of State Condoleezza Rice said the Bush administration welcomed Israel's decision and a summit set for later Sunday in Egypt is meant to give international backing to the truce.
Leaders of Germany, France, Spain, Britain, Italy, Turkey and the Czech Republic — which holds the rotating European Union presidency — are expected to attend along with Palestinian President Mahmoud Abbas, Egyptian President Hosni Mubarak and U.N. chief Ban Ki-moon.
Ban welcomed the Israeli move and called on Hamas to stop its rocket fire. "Urgent humanitarian access for the people of Gaza is the immediate priority," he said, declaring that "the United Nations is ready to act."
It was not immediately clear whether Israel would send a representative to the meeting in Egypt, and Hamas, shunned widely as a terrorist organization, has not been invited.
In announcing the truce late Saturday, Prime Minister Ehud Olmert said Israel would withhold fire after achieving its goals and more.
"Hamas was hit hard, in its military arms and in its government institutions. Its leaders are in hiding and many of its men have been killed," Olmert said.
If Hamas holds its fire, the military "will weigh pulling out of Gaza at a time that befits us," Olmert said. If not, Israel "will continue to act to defend our residents."
In Gaza, people began to take stock of the devastation. The Shahadeh family loaded mattresses into the trunk of a car in Gaza City, preparing to return to their home in the hard-hit northern Gaza town of Beit Lahiya.
"I've been told that the devils have left," said Riyadh Shahadeh, referring to the Israelis. "I'm going back to see how I'm going to start again. I don't know what happened to my house. ... I am going back there with a heart full of fear because I am not sure if the area is secure or not, but I have no other option."
In the southern town of Rafah, where Israel bombed dozens of smuggling tunnels, construction worker Abdel Ibn-Taha said he was very happy about the truce. "We're tired out," he said.
Schools in southern Israel remained closed in anticipation of possible rocket fire. Shortly before the rocket volley Sunday, the head of the Parents Association in the border town of Sderot, Batya Katar, said she was disappointed with the unilateral nature of the truce and the fact that Israel did not reach an agreement directly with Hamas, which Israel shuns.
"It's an offensive that ended without achieving its aims," Katar said. "All the weapons went through Egypt. What's happened there?"
Israel apparently reasons that the two-phase truce would give it ammunition against its international critics: Should Hamas continue to attack, then Israel would be able to resume its offensive after having tried to end it. It was not immediately clear how many rockets would have to fall to provoke an Israeli military response.
Hamas, which rejects Israel's existence, violently seized control of Gaza in June 2007, provoking a harsh Israeli blockade that has deepened the destitution in the territory of 1.4 million Palestinians. The Israeli war did not loosen Hamas' grip on Gaza, and the group vowed that a unilateral cease-fire was not enough to end the Islamic movement's resistance.
"The occupier must halt his fire immediately and withdraw from our land and lift his blockade and open all crossings and we will not accept any one Zionist soldier on our land, regardless of the price that it costs," Hamas spokesman Fawzi Barhoum said.
More moderate Palestinians also reacted with skepticism to Israel's two-phase truce and called on world leaders attending the Egypt summit to press Israel to pull out its troops immediately.
"This is an important and necessary event but it's insufficient," said Abbas, Hamas' bitter rival and the top leader in the West Bank, the larger of the two Palestinian territories. "There should be a comprehensive Israeli withdrawal from Gaza, a lifting of the siege and a reopening of crossings" to aid, he said.