JERUSALEM — Four Israeli soldiers and 10 Palestinian militants were killed inside Israeli territory Monday morning, Israeli military officials said, after gunmen from the Gaza Strip managed to infiltrate through two more of the tunnels that Israel says its ground operation is targeting.
As diplomatic pressure for a cease-fire mounted on the conflict’s 14th day, the Palestinian death toll topped 500 and the number of Israeli soldiers killed hit 25, more than twice as many as in Israel’s last Gaza ground operation in 2009. Two Israeli civilians have also died from rocket and mortar fire.
The military provided few details about the incursions into Israel, outside Gaza’s northeast corner, saying only that “two terror squads were detected.” An airstrike targeted one group of militants, the statement said, and “soldiers who were called to the scene” engaged the other.
The military released video footage showing several masked gunmen in bushes that it said were about a half-mile from the Israeli border town of Sderot, and an explosion that targeted them as they retreated back into the tunnel. Three other Israeli soldiers were killed in battles inside Gaza on Monday.
Ismail Haniya, until recently the Hamas prime minister, said in a speech broadcast from Gaza that the fighting would continue unless an agreement met the movement’s demands: opening crossings; lifting restrictions on fishing, farming, import and export; and releasing prisoners who were freed in a 2011 exchange for an abducted Israeli soldier and recently rearrested.
“We’ll never go back to the period before the aggression, we’ll never go back to the slow death,” Mr. Haniya said in an address laden with Quranic verses. “Gaza will be the graveyard for the invaders, as it always was in the history.”
In Gaza, the United Nations reported nearly 100,000 people in 67 shelters, as an airlift of 45,000 mattresses and 10,000 blankets was en route from Dubai.
As the Palestinian death toll has climbed over two weeks, thousands of people streamed toward Gaza City from the north on foot, in donkey carts and packed into cars. The Israelis seemed to be stepping up artillery shelling in the central Gaza refugee camps of El Bureij and El Mughazi, where they had earlier urged people to evacuate.
Hamas radio reported that four people were killed in a strike on Al Aqsa Martyrs Hospital in El Bureij.
Knots of 10 to 12 people were hurrying with plastic bags of belongings across the main road, Salahadin Street, where a shell hit next to a car full of international journalists, spraying shrapnel on the roof. Hazem Abu Ghaben, who lives in El Mughazi, said he had gone to a relative’s house over the weekend, returned home because he thought things had calmed down, then regretted it and was fleeing anew.
The situation had gotten “a million times worse,” Mr. Abu Ghaben said.
At the Abu Jamei family’s home near the southern town of Khan Younis, people searching beneath the rubble left by an overnight attack on Monday counted 26 bodies, by far the most victims of a single strike in this offensive. In the southern border town of Rafah, artillery shelling of homes belonging to the Siam family killed 11 people, witnesses said, including three children.
Rocket fire from Gaza slowed somewhat from earlier days, but more than a dozen sirens sounded around midday. One rocket hit a home in Sderot, near Gaza, while the occupants cowered in a safe room, and another landed in an open field near Tel Aviv.
Across Israel, funerals were scheduled for at least five soldiers from the decorated Golani Brigade who were killed in Shejaiya on Sunday. The military said it had still not determined whether a soldier had indeed been captured alive, as Hamas claimed in a statement on Sunday night. The Israeli military announced that two of the dead were among the hundreds of Americans in the Israeli Army: Max Steinberg, 24, from Southern California and Nissim Sean Carmeli, who grew up in Texas but finished high school in Israel.
The new underground incursions highlighted a dilemma for Israel’s leadership, which has tried to build international support for its ground operation by saying it was a limited one focused on the tunnel threat, and by embracing cease-fire proposals from Egypt. Now, with President Obama dispatching Secretary of State John Kerry to Cairo to seek an immediate halt to hostilities, Israel may be pressured to leave the tunnel mission unfinished in order to restore quiet.
“It’s a very difficult question,” a senior Israeli military official said Sunday night, speaking on the condition of anonymity under military protocol.
“We have a mission, and we are going to fulfill it — Israel is not going to leave the threats of tunnels beneath the border between Gaza Strip and Israel,” he said. Still, he added, “after 13 days of fighting, and so many casualties, I believe that it’s the right time for all sides to stop.”
Though Israel had a task force studying the tunnels for a year, its forces have discovered since entering Gaza on Thursday that the network is much bigger and more sophisticated than they had anticipated. There are multiple exit and entry points for each tunnel, making them difficult to track and demolish. “Our goal now is to finish the job by really destroying as much tunnels as we can, if not all of them,” the Israeli official said. “It’s very difficult for me to say all of them because there’s always a chance we don’t know all the tunnels, and what you don’t know you simply don’t know.”
The ground invasion began Thursday night after the Israeli military thwarted a tunnel attack early that morning by what it said were 13 militants. On Saturday morning, some eight men from Gaza disguised in Israeli military uniforms attacked two army jeeps a few hundred yards into Israeli territory, killing a 45-year-old reserve officer and a soldier. There were two other incursions Saturday, one in which the militants were carrying handcuffs and tranquilizers, which the Israeli military said indicated they were planning an abduction.
Dan Shapiro, the United States’ ambassador to Israel, said Monday that Mr. Kerry would be working with Egyptians, Israelis and leaders of the Palestinian Authority to “bring back the quiet” that followed a 2012 agreement ending eight days of cross-border violence. In an interview on Israel Radio, Mr. Shapiro said Washington supported “Israel’s right to protect itself” and “understood the need” to destroy tunnels, but was “also worried about the number of dead and injured.”
“Start with a cease-fire,” he said, “and only after hold discussions on the problems at the base of the crisis.”
But Gilad Erdan, a right-wing member of Israel’s so-called security cabinet, which makes strategic decisions, said Israel “must not agree to any proposal for a cease-fire until the tunnels are eliminated,” according to the Israeli news site Ynet. Speaking after he visited wounded soldiers at Barzilai hospital, Mr. Erdan raised the specter of a reoccupation of Gaza, saying that “a green light has been given to expanding the action, and we should consider leaving forces in the northern part of the Gaza Strip to deal with the tunnels at the end of the operation.”
Tzipi Livni, Israel’s justice minister and representative to the American-sponsored peace negotiations with the Palestinians that collapsed in April, said “demilitarization of Gaza” was essential but was “something we will discuss with the international community the day after.”
“Now we are focused on the need to stop these terrorists, to act against these tunnels, and to stop these rockets against Israel,” Ms. Livni said in a conference call with international journalists that was interrupted by sirens signaling incoming rockets from Gaza overhead. “The whole idea of the proposal is to cease the fire, stop the fire. This is the main goal right now.”
Noting that Ban Ki-moon, the secretary general of the United Nations, was headed to Cairo as well as Mr. Kerry, she added, “These days are, I believe, crucial days.”
Lt. Col. Peter Lerner of the Israeli military said in an early-morning briefing that intense fighting had continued overnight in the eastern Gaza City neighborhood of Shejaiya, where more than 60 Palestinians and 13 Israeli soldiers died in the clashes Sunday. Colonel Lerner said that 10 Hamas fighters were killed Monday in Shejaiya, and that six underground tunnels had been “completely demolished” across Gaza in the past 24 hours. A total of 16 tunnels with 43 entry points had been uncovered since the start of the ground invasion Thursday night, he said.
The latest tunnel incursion unfolded Sunday morning near kibbutz Nir Am, a community of 400 people established before the state of Israel. Micha Ben-Hillel, who has lived on the kibbutz for half a century, said he heard heavy gunfire throughout the night but “had no idea what it was about.” Kibbutz security officials informed him about 8 a.m. that militants had exited a tunnel about 500 yards from the community’s center.
“When our kids were younger we used to have picnics there – there’s a nice forest there, we have pine trees, and that’s actually where the battle took place,” said Mr. Ben-Hillel, 68, who teaches English. “It’s quite shocking how different the situation is today than it used to be.”
Mr. Ben-Hillel said that about three-quarters of the kibbutz residents had left in recent days to stay in hotels or with relatives elsewhere in Israel, but that his family had stayed, in part because his wife, who was born on Nir Am, is in charge of caring for its elderly residents. One is her own father, Nissan Tsuri, 99, who Mr. Ben-Hillel said was commander of the kibbutz in 1948.
“He doesn’t run away from these rockets, doesn’t go to the safe room,” the son-in-law said. “He says it was worse during the War of Independence.”