Israel: Three civilians killed, long-rage rocket from Gaza strikes near Tel Aviv NBC's John Ray reports from a funeral procession for Hamas' Ahmed Jabari in Gaza City, where Palestinians vow to avenge the deadly Israeli strike. Updated 11:48 a.m. ET: Three Israeli civilians were killed and six injured on Thursday as rockets were fired from Gaza into Israel, including a long-range missile that struck a suburb eight miles south of Tel Aviv. Israel launched numerous airstrikes across the Gaza Strip as the region's military showdown lurched closer to all-out war. Fifteen Palestinians have been killed and 100 injured in Gaza since Wednesday, Reuters reported. The long-range missile, which landed in an open area outside Rishon Lezion, causing no injuries or damage, was thought to be the first of its kind launched from Gaza. Air raid sirens were later sounded in Tel Aviv, at about 6.30 p.m. local time (11:30 a.m. ET), Israeli news site Haaretz reported. Earlier Thursday, the funeral was held Thursday for Ahmed Jabari, the senior Hamas military commander, who was one of those killed in the Israeli Defense Force airstrikes. The incident came after Hamas' top military commander and others were killed in a series of airstrikes by the Jewish state. The IDF said on its website that the three people killed were civilians in the southern Israeli town of Kiryat Malachi. "In the past 24 hours, 245 rockets have been fired from the Gaza Strip into southern Israel," it said. Hamas chief Khaled Meshaal on Thursday condemned the killing of Jabari. "Men and women in Palestine, we will continue the resistance," Meshaal said at a meeting of Islamic leaders in the Sudanese capital Khartoum. Analysis: Israel, Gaza slide closer to war neither side wants Egypt officially requested on Thursday a full meeting of the Security Council to discuss what it described as Israeli aggression, and withdrew its ambassador from Israel. Egypt's President Mohammed Morsi said in a televised address to the nation Thursday that Israel's attacks on the Gaza Strip were "unacceptable" and would lead to instability in the region. Israeli Prime Minister Benjamin Netanyahu delivers remarks on the recent air strike that killed Hamas military leader Ahmad Jabari, saying the nation "will not tolerate rocket and missile attacks on civilians" and is "prepared to take whatever action is necessary" to defend its people. Morsi said he had discussed "ways to reach calm and end the aggression" in a telephone conversation with U.S. President Barack Obama. The Muslim Brotherhood on Thursday called for all ties with Israel to be severed. Hamas has been emboldened by the Islamist rise to power in Egypt, viewing Morsi as a "safety net" who will not permit a second Israeli thrashing of Gaza, home to 1.7 million Palestinians. Israel says it has already destroyed much of Gaza's longer-range rocket stockpiles. Reuters reported that Hamas had claimed it had fired a 1.1 ton, Iranian-made Fajr 5 rocket at Tel Aviv, but there was no reported impact in the Israeli city. President Barack Obama also spoke to Israel's Prime Minister Benjamin Netanyahu as well as Morsi on the telephone late Wednesday. A White House spokesman said Obama reiterated to both leaders the United States' support for Israel's right to self-defense, and agreed with Morsi on the importance of working to de-escalate the situation. In a statement, House of Representatives Majority Leader Eric Cantor (R-Va.) echoed Obama's support for Israel and called on Egypt to return its ambassador to Israel. "This is also an important moment for Egyptian President Morsi and other Egyptian leaders to demonstrate that Egypt is committed to being a responsible international actor," the statement said. Reuters, NBC News' Catherine Chomiak and Alastair Jamieson contributed to this report.