International protests are mounting as Israel intensifies its siege of the Palestinian President Yasser Arafat's Ramallah compound.
Thousands of Palestinian civilians have taken to the streets in protest at their leader's treatment.
The European Union, France, Russia and Arab countries have called for an end to the siege.
At least four demonstrators have been killed and Israel has repeated its threats to blow up the building where Arafat is under siege.
Israel initially called for the surrender of 19 Palestinian officials, including members of the intelligence service and the Force 17 bodyguard unit.
A senior army officer taking reporters on a tour of Arafat's compound said Israel wanted 50 men to give themselves up. Army officials said the figure increased because Israel initially did not have a complete picture of who is inside.
Israel's deputy defence minister, Weizman Shiri, said Arafat was free to leave the country but would not be allowed to return.
"We'll give him a one-way ticket in a dignified way," Shiri told Army Radio. Some Cabinet ministers called for Arafat's expulsion.
Shiri did not say which country could be likely destination. "If he decides he wants to get out we'll find him a good place," he said.
Israel, preparing for a long stand-off, planted an Israeli flag on top of Arafat's office building. Officials said troops would not withdraw from the compound before the wanted men surrender, and left open the possibility that even then they might not leave.
Early today, Arafat's Fatah movement led protest marches in the West Bank and Gaza towns, some defying Israeli military curfews.
In Gaza City, thousands marched in front of the Palestinian parliament building in Gaza City, protesting against the Israeli operation. Abu Mohammed, an armed member of the Al Aqsa Martyrs Brigades militia, linked to Arafat's Fatah, said: "It is time for all Palestinians to teach the Israelis a lesson and defend Arafat."
In Ramallah, just a few miles from Arafat's compound, troops fired tear gas and bullets to disperse hundreds of men, women and children chanting: "Long live Arafat, long live Palestine."
Two protesters were killed by army fire, hospital officials said. Two more people were killed in Tulkarem and the Balata refugee camp next to Nablus.
In Tulkarem, gunmen walking in a crowd of about 1,200 people traded fire with Israeli troops, witnesses said. In the town of Rafah in the Gaza Strip, about 5,000 people joined the protests, some firing submachine guns into the air and holding up Arafat pictures.
Israel military officials, speaking on condition of anonymity, said soldiers opened fire on armed Palestinians after warning shots were ignored.
In Nablus, a 13-year-old Palestinian was shot and killed by Israeli soldiers while violating the curfew in the city, hospital officials said. The Israeli military had no comment.
In the West Bank town of Jericho, about 400 protesters marched to a local prison, demanding the release of six men held under US and British supervision as part of a deal that prompted Israel to lift its siege of Arafat's compound in May.
The foreign monitors threatened to leave, saying they felt endangered by the mob, according to security officials in Jericho.
The Israeli siege was expected to revive the Palestinian leader's sagging popularity, and put on hold recent attempts led by Arafat loyalists to force him to share power.
Three days into Israel's assault on Arafat's once sprawling headquarters - launched in reprisal for a Tel Aviv bus bombing that killed six - the main office building was surrounded by barbed wire, piles of debris and heaps of smashed cars.
Arafat and dozens of aides and security guards were confined to four rooms on the second floor of one wing after a tank shell destroyed the stairs to the third floor. Several more shells hit the building, and one dusted Arafat with debris, aides said.
A picture taken by his personal photographer and released yesterday showed a grim-faced Arafat wearing thick, black-rimmed glasses, poring over papers at his desk, with several aides at his side. Beside him was a holstered pistol, next to a desk calculator, a box of tissues and two bottles of mineral water.
Those trapped with him said Israeli troops demolished water pipes, the main kitchen and the pantry, but that there was enough water from rooftop tanks and stored food to last a few days.
The UN Security Council is to meet tomorrow to discuss the siege.
AP