GAZA CITY, Gaza Strip (AP) -- Palestinian militants barraged Israel with more than 200 rockets on Thursday, killing three people as Israel pressed a punishing campaign of airstrikes on militant targets across the Gaza Strip. Three rockets targeted the densely populated Tel Aviv area, setting off air raid sirens in brazen attacks that threatened to trigger an Israeli ground invasion of Gaza.
Late in the day, Israel signaled a ground operation may be imminent as forces moved toward the border area with Gaza. At least 12 trucks were seen transporting tanks and armored personnel carriers, and a number of buses carrying soldiers arrived. Israeli Defense Minister Ehud Barak said he had authorized the army to call-up additional reservists for possible action. The army said it was prepared to draft up to 30,000 additional troops.
Israel TV stations said a ground offensive was expected Friday.
The fighting, the heaviest in four years, has killed 15 Palestinians in two days and brought life to a standstill on both sides of the border. School has been canceled and many were huddling indoors.
Israel and Hamas have largely observed an informal truce for the past four years. But in recent weeks, the calm unraveled in a bout of rocket attacks on Israel from Gaza and retaliatory Israeli airstrikes.
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Jihad Masharawi weeps while he holds the body of his 11-month old son Ahmad, at Shifa hospital following an Israeli air strike on their family house, in Gaza City, Wednesday, Nov. 14, 2012. AP / Majed Hamdan
Israeli soldiers take cover as an air raid siren warns of incoming rockets before the funeral of Aaron Smadja, one of the three Israelis killed by a rocket fired from Gaza, at a cemetery in the southern town of Kiryat Malachi, Thursday, Nov. 15, 2012. AP / Tsafrir Abayov
Israeli security personnel take cover in Kiryat Malachi, southern Israel, Thursday, Nov. 15, 2012. AP / Tsafrir Abayov
Ultra Orthodox Jewish men gather around the body of Mirah Sharf that was killed in the southern town of Kiryat Malachi by a rocket thought to have been fired by Palestinian militants from the Gaza Strip, during her funeral in Jerusalem, Thursday, Nov. 15, 2012. AP / Sebastian Scheiner
A woman photographs Israeli soldiers on top an armored personal carrier close to the Israel Gaza Border, southern Israel,Thursday, Nov. 15, 2012. AP / Ariel Schalit
Israeli prime minister Benjamin Netanyahu leaves the room after delivering a statement to the media in Tel Aviv, Israel, Thursday, Nov. 15, 2012. AP / Dan Balilty
An Israeli soldier throws a blood-stained table from an apartment building hit by a rocket fired from the Gaza Strip, killing three people in Kiryat Malachi, southern Israel, Thursday, Nov. 15, 2012. AP / Tsafrir Abayov
A Zaka volunteers clean blood stains from a children's room in an apartment in a building that was hit by a rocket fired from the Gaza Strip, where three people were killed in Kiryat Malachi, southern Israel, Kiryat Malachi, southern Israel,Thursday, Nov. 15, 2012. AP / Ariel Schalit
Nov. 15, 2012 -- Sderot, Israel - Israeli resident Yafa sits in her sister's yard after a rocket fired from the Gaza Strip hit her wall. ZUMA24.com / Yin Dongxun
Hand prints and shrapnel holes on a wall in apartment in building that was hit by a rocket fired from the Gaza Strip, where three people were killed in Kiryat Malachi, southern Israel, Kiryat Malachi, southern Israel,Thursday, Nov. 15, 2012. AP / Ariel Schalit
Israeli soldiers and civilians run to a rocket shelter as a siren sounds signaling an attack coming from the nearby Gaza Strip in Neva settlement, near the Israel-Egypt border, Wednesday, Nov. 14, 2012. AP / Tsafrir Abayov
The Iron Dome defense system fires to interecpt incoming missiles from Gaza in the port town of Ashdod, Thursday, Nov. 15, 2012. AP / Tsafrir Abayov
A rocket launched by Palestinian militants towards Israel makes its way from the northern Gaza Strip, seen from the Israel Gaza Border, southern Israel, Thursday, Nov. 15, 2012. AP / Ariel Schalit
Nov. 15, 2012 - Jerusalem, Palestinian Territory - An Israeli security force soldier shoots a tear gas canister toward Palestinian demonstrators during clashes in protest to Israel's military operation in Gaza, in the East Jerusalem neighborhood of Issawiya. ZUMA24.com / Mahfouz Abu Turk
A Palestinian demonstrator runs through a cloud of tear gas during clashes against Israel's operations in Gaza Strip, outside Ofer, an Israeli military prison near the West Bank city of Ramallah, Thursday, Nov. 15, 2012. AP / Majdi Mohammed
An Israel war plane drops a bomb over the northern Gaza Strip, seen from the Israel Gaza Border, southern Israel, Thursday, Nov. 15, 2012. AP / Ariel Schalit
Explosion and smoke rise following an Israeli air strike in the northern Gaza Strip, seen from the Israel Gaza Border, southern Israel, Thursday, Nov. 15, 2012. AP / Ariel Schalit
Explosion and smoke rise following an Israeli air strike in the northern Gaza Strip, seen from the Israel Gaza Border, southern Israel, Thursday, Nov. 15, 2012. AP / Ariel Schalit
Smoke rises following an Israeli attack on Gaza City, Thursday, Nov. 15, 2012. AP / Hatem Moussa
A Palestinian relative carries a wounded girl into the treatment room of Shifa hospital following an Israeli airstrike, in Gaza City, Wednesday, Nov. 14, 2012. AP / Majed Hamdan
People gather around a wreckage of the car in which was killed Ahmed Jabari, head of the Hamas military wing in Gaza City, Wednesday, Nov. 14, 2012. AP / Adel Hana
Nov. 15, 2012 - Khan Yunis, West Bank - A Palestinian man holds his wounded child after an Israeli airstrike. ZUMA24.com / Emad Drimly
Nov. 15, 2012 - Gaza - Palestinians try to pull out a man trapped in a car after an Israeli air raid on the area of Twaam. ZUMA24.com / Yasser Qudih
Palestinian men react at hospital after the body of Ahmed Jabari, head of the Hamas military wing, was brought, in Gaza City, Wednesday, Nov. 14, 2012. The Israeli military said its assassination of the Hamas military commander marks the beginning of an operation against Gaza militants. (AP Photo/Hatem Moussa) AP / Hatem Moussa
Nov. 15, 2012 - Gaza City, West Bank - Palestinians carry the body of Ahmed Al-Jaabari, chief of Hamas' military wing, during his funeral. Thirteen Palestinians have been killed in a series of Israeli airstrikes on the Gaza Strip, among them was Ahmed al-Jaabari, head of Ezz el-Deen al-Qassam Brigades. (Credit Image: © Emad Drimly/Xinhua/ZUMA24.com) ZUMA24.com / Emad Drimly
Nov. 15, 2012 - Gaza City, Gaza Strip - Mourners carry the body of a girl of during her funeral. ZUMA24.com / Ashraf Amra
The parents of 11 month-old Palestinian baby Ahmed Masharawi, killed in an Israeli strike, hold his body during his funeral in Gaza City, Thursday, Nov. 15, 2012. AP / Adel Hana
A Palestinian boy holds a window pane taken from a damaged house hit in an Israeli strike, in Gaza City, Thursday, Nov. 15, 2012. AP / Hatem Moussa
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