A badly weakened Prime Minister Benjamin Netanyahu scrambled Wednesday to keep his job by extending his hand to a new centrist party that advocates a more earnest push on peacemaking with the Palestinians after Israel's parliamentary election produced a stunning deadlock.

The results defied forecasts that Israel's next government would veer sharply to the right at a time when the country faces mounting international isolation, growing economic problems and regional turbulence.

While that opens the door to unexpected movement on peace efforts, a coalition joining parties with dramatically divergent views on peacemaking, the economy and the military draft could just as easily be headed for gridlock — and perhaps a short life.

Israeli media said that with nearly all votes counted, each bloc had 60 of parliament's 120 seats. Commentators said Netanyahu, who called early elections three months ago expecting easy victory, would be tapped to form the next government because the rival camp drew 12 of its 60 seats from Arab parties that traditionally are excluded from coalition building.

A surprising strong showing by a political newcomer, the centrist Yesh Atid, or There is a Future, party, in Tuesday's vote turned pre-election forecasts on their heads and dealt a setback to Netanyahu. Yesh Atid's leader, Yair Lapid, has said he would only join a government committed to sweeping economic changes and a serious push to resume peace talks with the Palestinians, which have languished throughout Netanyahu's four-year tenure.

The results were not official, and the final bloc breakdowns could shift before the central elections committee finishes its tally early Thursday. With the blocs so evenly divided, there remains a remote possibility that Netanyahu would not form the next government, even though both he and Lapid have called for the creation of a broad coalition.

Under Israel's parliamentary system, voters cast ballots for parties, not individual candidates. Because no party throughout Israel's 64-year history has ever won an outright majority of parliamentary seats, the country has always been governed by coalitions.

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Yair Lapid, leader of the 'Yesh Atid' (There is a Future) party, is a former TV news anchor whose centrist party, exit polls showed, soared to second place in the balloting.

Traditionally, the party that wins the largest number of seats is given the first chance to form a governing alliance in negotiations that centre around promising Cabinet posts and policy concessions. If those negotiations are successful, the leader of that party becomes prime minister. If not, the task falls to a smaller faction. President Shimon Peres has until mid-February to set that process in motion, though he could begin earlier.

Netanyahu's Likud-Yisrael Beitenu alliance polled strongest in Tuesday's election, winning 31 parliamentary seats. But that is still 11 fewer than the 42 it held in the outgoing parliament and below the forecasts of 32 to 37 in recent polls. Yesh Atid had been projected to capture about a dozen seats but won 19, making it the second-largest in the legislature.

Addressing his supporters early Wednesday, when an earlier vote count gave his bloc a shaky, one-seat parliamentary margin, Netanyahu vowed to form as broad a coalition as possible. He said the next government would be built on principles that include reforming the contentious system of granting draft exemptions to ultra-Orthodox Jewish men and the "responsible" pursuit of a "genuine peace" with the Palestinians. He did not elaborate, but the message seemed aimed at Lapid.

CBC's Saša Petricic reports

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"The electorate didn’t just punish Prime Minister Benjamin Netanyahu, it also rebelled against much of the political establishment," observed CBC Middle East correspondent Saša Petricic, reporting from Israel. "The big winners are both newcomers, perceived as fresh, successful and 'untainted by incumbency: One a famous TV anchor, the other a dot-com millionaire."

Netanyahu called Lapid early Wednesday and offered to work together. "We have the opportunity to do great things together," Likud quoted the prime minister as saying. Lapid also called for the formation of a broad government.

"I call on the leaders of the political establishment to work with me together, to the best of their ability to form as broad a government as possible that will contain moderate forces from the left and right, the right and the left, so that we will truly be able to bring about real change," he told supporters after initial results were in early Wednesday.

The goal of a broad coalition will not be an easy one, however, and will force Netanyahu to make some difficult decisions.

In an interview last week with The Associated Press, Lapid said he would not be a "fig leaf" for a hard-line agenda on peacemaking. A leading party member, Yaakov Peri, said Wednesday that Yesh Atid will not join unless the government pledges to begin drafting the ultra-Orthodox into the military, lowers the country's high cost of living and returns to peace talks.

'We have the opportunity to do great things together.'— Prime Minister Benjamin Netanyahu  

"We have red lines. We won't cross those red lines, even if it will cost us sitting in the opposition," Peri told Channel 2 TV.

That stance could force Netanyahu to promise overtures — perhaps far more sweeping than he imagined — to get peace negotiations moving again.

But a harder line taken by traditional and future hawkish allies could present formidable obstacles to coalition building.

Experience also shows that promises made during coalition negotiations do not always pan out. Centrist parties have been drawn before into coalitions dominated by hawks, only to bolt later in frustration over impasses in peacemaking. Yesh Atid has not yet spelled out specific conditions it would set down on this issue.

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Head of the Bayit Yehudi party Naftali Bennett is surrounded by supporters at his party's headquarters in Ramat Gan, near Tel Aviv. (Ronen Zvulun/Reuters)

The election results surprised Israelis, given the steady stream of recent opinion polls forecasting a solid hard-line majority and a weaker showing by centrists. Netanyahu may have suffered because of his close ties to the ultra-Orthodox and perhaps from complacency. Many voters chose smaller parties, believing a Netanyahu victory was assured.

Statistician Camil Fuchs, who conducts polls for Israeli media, said previously undecided voters who had accounted for up to 23 per cent of those questioned in opinion surveys, threw their support to Lapid in large numbers. Pollster Mina Zemah said support surged for Lapid in the last few days of the campaign, and he drew about 50 per cent of his support from the right.

Lapid said the election outcome reflected a longing for unity in a country beset by schisms.

"That is the message that the results of the elections have sent us," he told cheering supporters. "The citizens of Israel today said no to politics of fear and hatred. They said no to the possibility that we might splinter off into sectors, and groups and tribes and narrow interest groups. They said no to extremists, and they said no to anti-democratic behaviour."