Greece's two main pro-bailout parties clinched enough votes to form a government in a cliffhanger election on Sunday, early results showed, easing fears the country will crash out of the euro.
"Today the Greek people expressed their will to stay anchored with the euro," said Antonis Samaras, the leader of the conservative New Democracy party which preliminary official results showed in the lead with 29.5%.
"We ask all political forces which share the aim of keeping the country in the euro... to join a government of national unity," he said at a press conference, adding: "The country does not have a minute to lose."
Samaras also pledged to honor Greece's commitments under an unpopular bailout deal which has imposed harsh austerity on many Greeks in return for a multi-billion package that has kept the Greek economy on life support.
His main rival Alexis Tsipras, leader of the radical leftist anti-austerity party Syriza, conceded defeat but vowed to fight on in opposition.
"I spoke to Samaras to congratulate him. He can form a government," said Tsipras, whose party came second with 27.1% of the vote.
"We will be here as the opposition, we represent a majority of people opposed to the bailout deal," he said.
The results appeared to heed an unprecedented warning on the eve of the vote from German Chancellor Angela Merkel who said it was "extremely important" that Greeks choose lawmakers who would abide by the terms of the bailout.
Eurogroup chief Jean-Claude Juncker warned that a victory for the radical left would have "unpredictable consequences" for the eurozone as a whole.
New Democracy would hold 128 seats in Greece's 300-seat parliament because of a 50-seat boost for the victor under the Greek system, early results showed.
Coalition talks are now expected to start Monday, with the most likely ally being the socialist Pasok party which won an estimated 33 seats.
Pasok leader Evangelos Venizelos said he was ready to join a coalition with New Democracy but only on condition that other leftist parties were included.
Venizelos said the new government should be one of "national responsibility."
Analysts say Pasok is concerned about instability if a narrow majority is called on to pass unpopular reforms under pressure from street protests.
Costis Hadzidakis, a senior New Democracy official said on Skai TV: "There needs to be a government. The country cannot remain directionless."
"This government has to be a national team with as big a majority as possible. What else has to happen for us to realize this?" he said.
Exit polls had shown a dead heat between New Democracy and Syriza which could have left Greece in the political gridlock between bickering parties which followed elections last month and triggered this vote just six weeks later.
Greece has been forced to seek bailouts twice, first for 110 billion euros in 2010 and then for 130 billion euros this year plus a 107 billion euro private debt write-off -- for a total of 347 billion euros ($439 billion).
There may be some room for compromise on the bailout conditions, such as extending a crucial deficit-cutting deadline to 2016 from 2014.
Just as the first results filtered through, German Foreign Minister Guido Westerwelle said Berlin was ready to discuss giving Greece more time.
"There can't be substantial changes in the engagements" undertaken by Greece in the bailout deal. "But I can imagine we discuss again a delay" in achieving the targets, he said on Germany's ARD public television.
Belgium's Foreign Minister Didier Reynders also told national media there was "room for maneuver" on the time Greece needs to deliver on bailout commitments.
Initial results also showed the neo-Nazi party Golden Dawn has won enough votes to enter parliament on the back of growing anti-immigrant sentiment and concern about security which has accompanied the economic crisis.
"I think that most people are anxious because the future is very dark," Tonia Katerini, a 54-year-old architect, told AFP after voting for Syriza in an elementary school in the upmarket Kolonaki district in central Athens.
"The situation in the last two years has been very hard for most people so I believe we have to make a big change," she said.
But Emmanuel Kamkoutis, a 68-year-old pensioner, said he voted for the right because he wanted "a pro-European government and not a communist one."
"We signed something. We can't just take it back," he said, referring to the bailout deal. "We have to try very hard to keep ourselves in the euro."
Greek newspapers said the vote was the most critical since the end of military rule in 1974.
For many Greeks a fine-tuning of the terms of the bailout may not be enough as public anger is rising against the steep pay and pension cuts seen since the crisis first exploded in 2009, setting off a chain reaction across Europe.
Greece is now in its fifth year of recession, prompting many young Greeks to vote with their feet by emigrating, while local media warn the state will run out of cash to pay public-sector salaries and pensions on July 20.
The ballot passed off mostly smoothly one ballot box was burnt in the radical Exarchia district of Athens and two grenades were found outside the offices of private media group Skai TV, which supports the unpopular austerity drive.
Copyright Agence France-Presse, 2012