Israeli, Palestinian forces plan cease-fire to Gaza Strip fighting Updated at 12:30 p.m. A top adviser to Egypt's president said that Israeli forces and Hamas militants will cease fire later Tuesday, ending nearly a week of fighting in the Gaza Strip that continued throughout the day, CBS News correspondent Clarissa Ward reports from Cairo. The unnamed adviser to Egyptian President Mohammed Morsi said Morsi will announce the cease-fire at 2 p.m. ET (9 p.m. Cairo time) and that it will go into effect three hours later, Ward reports. However, the adviser said that the agreement was "subject to change," Ward reports. 72 Photos Earlier, a source close to the Hamas delegation in Cairo told Ward that he believed some agreement would be reached "within a few hours." According to the source, Israel wants Hamas to stop rocket fire for an initial 24 hours, and then the Jewish state would theoretically meet some of the militant group's demands. Ward notes, however, that previous remarks from diplomats suggesting a deal was near have proven premature, as Israel remains reluctant to accept Hamas' key demand that a total blockade on the Gaza Strip be lifted. Israel fears that lifting the blockade would allow more weapons to flow into the tiny Palestinian territory. Israel has not formally said a deal has been reached, and even Hamas officials issued conflicting comments earlier Tuesday about an agreement. A senior Hamas official told The Associated Press that his group was close to a cease-fire after the Reuters news agency reported a deal had been reached. Moussa Abu Marzouk told the AP from Cairo that "we haven't struck the deal yet, but we are progressing and it will most likely be tonight," after Ayman Taha told Reuters that "an agreement for calm has been reached." At a press conference with U.N. chief Ban Ki-moon, Israeli Prime Minister Benjamin Netanyahu said, "If a long-term solution can be put in place by diplomatic means, Israel will be a willing partner." Meanwhile, a Palestinian rocket struck the outskirts of Jerusalem in one of the longest rocket strikes fired from the Gaza Strip in nearly a week of fighting as diplomats from around the world sought to contain the bloody conflict. The rocket attack, the second aimed at the holy city since an Israeli offensive began a week ago, set off air raid sirens throughout the metropolis. A distant explosion could be heard in the city's downtown. Jerusalem residents ran for cover as buses and trains stopped to let passengers off. Police spokesman Micky Rosenfeld said the rocket landed in Gush Etzion, a collection of Jewish West Bank settlements southeast of the city. Last Friday's attempt to hit Jerusalem landed in the same area. No one was wounded in either attack. Jerusalem, nearly 50 miles from Gaza, is the most distant city the militants have targeted, signaling an increasing sophistication in their arsenal. Tuesday's rocket attack occurred as diplomats were trying to work out a cease-fire. Israeli officials estimate that Gaza's Hamas rulers will try to stage similar attacks ahead of any truce taking hold. Morsi, perhaps the most important interlocutor between the militant Hamas group that rules the Palestinian territory and the Israelis, had earlier predicted Tuesday that the offensive would end within hours. Morsi gave no explanation for his statement, saying only that the negotiations between the two sides will yield "positive results" during the coming hours. President Obama dispatched Secretary of State Hillary Rodham Clinton to the Mideast from Cambodia, where she had accompanied Mr. Obama on a visit. The Palestinian rocket was fired toward Jerusalem just minutes before Ban arrived in the holy city. "This must stop, immediate steps are needed to avoid further escalation, including a ground operation," Ban said from Egypt. Both sides must hold fire immediately ... The attacks aimed at Jerusalem and the Tel Aviv area have dramatically showcased the militants' new capabilities, including a locally made M-75 rocket that appears to have taken Israeli defense officials by surprise. For more than a decade, the militants' range had been limited to steadily broadening sections of southern Israel. The attack on Jerusalem was especially audacious, both for its symbolism and its distance from Gaza. Jerusalem had previously been considered beyond the range of Gaza rockets - and an unlikely target because it is home to the Al-Aqsa Mosque compound, Islam's third-holiest shrine. Shortly afterward, an Israeli airstrike destroyed a car in Gaza City killing five people and seriously wounding four others. Their identities were not immediately known. In a sign of the difficulty diplomats will have in forging such a cease-fire, a man identified as Mohammed Deif, Hamas' elusive military commander, urged his fighters to keep up attacks on Israel. Speaking from hiding on Hamas-run TV and radio, Deif said Hamas "must invest all resources to uproot this aggressor from our land," a reference to Israel. Deif is one of the founders of Hamas' military wing and was its top commander until he was seriously wounded in an Israeli airstrike in 2003. He was replaced as the de facto leader by Ahmed Jabari, who was assassinated by Israel last week in the opening salvo of its latest Gaza offensive.