And that concludes our live coverage of a historic night in Greece - the first electoral victory for an anti-austerity party in the eurozone since the start of the crisis in 2008. Follow ournews story for further updates.
- Anti-austerity party Syriza is heading for clear victory in Greece's general election, an official projection shows
- Leader Alexis Tsipras says his new government will negotiate a viable financial solution but existing international bailout conditions are over
- Outgoing Prime Minister Antonis Samaras concedes victory
- Syriza may fall just short of 151 seats needed for an outright majority
- Far-right Golden Dawn and centrist The River are set for joint third place - smaller parties will determine if Syriza can govern outright
- All times GMT
With 80% of the vote counted, Syriza is projected to win 149 seats in parliament - two short of a majority.
UK Prime Minister David Cameron hastweeted to say the Greek election will "increase economic uncertainty across Europe". "That's why the UK must stick to our plan, delivering security at home," he added. The Conservative leader is fighting a general election himself in May.
Nick Barnets, journalist
Analysts say the eurozone is set for a new bout of volatility, according to AFP.
"A period of uncertainty and heightened market nervousness now seems likely," says Jonathan Loynes of Capital Economics. Unicredit chief economist Erik Nielsen said Greece was in for a "volatile month". While a deal on its debt was still possible, he added, the viability of an anti-austerity government was less certain.
Jerry Siokos in Athens emails: The time of the Left to govern has come. It will be tested fiercely. I don't believe there are plenty of possibilities for any government to change the current situation, therefore I don't feel full of hope. This crisis, in the European South, has mostly affected the youth, and that is why Europe's future is uncertain.
Russell Brand, British comedian and campaigner
Kathimerini, Greek newspaper
With 74% of the vote counted, Syriza has won 36%, followed by New Democracy with 28.1%, the far-right Golden Dawn with 6.3% and The River with 5.9 6%.
The other three parties projected to pass the 3% hurdle to get into parliament are the Greek Communist Party (5.4%), Pasok (4.7%) and Independent Greeks (4.7%).
You can follow the returnslive on the Greek interior ministry's website.
If you are just joining us, Greece's anti-austerity party Syriza has won the general election and is set to win 149-151 seats in the 300-seat parliament.
It is so far unclear if the party will have an outright majority but leader Alexis Tsipras has praised the vote as an end to the "vicious circle of austerity". Your mandate cancels the international bailouts, he told supporters, but he added that his government would be ready to negotiate a fair, "mutually beneficial solution".
Iraklis Diakos emails: ...Tsipras's party has a difficult road ahead. He has to deal not only with corruption, injustice and poor performance of services in the public sector but also with a widening national deficit and tough creditors with harsh demands.
I just hope for the best for the people of this nation since the measures taken by New Dawn have led to widening the gap between the rich and the poor with unfair and extreme measures for the middle and lower class which led to thrashing the middle class to the grounds.
Belgium's finance minister sees some room to discuss the "modalities" of the Greek debt programme with the other eurozone nations, AP news agency reports.
Johan Van Overtveldt told a Belgian TV channel: "We can talk modalities, we can talk debt restructuring, but the cornerstone that Greece must respect the rules of monetary union, that must stay as it is."
He added: "It is impossible to fundamentally change things."
Yannis emails: I am a 27 year old software engineer from Greece. I am not scared by the election's result but neither do I feel hope. Nothing will change. Greece will just lose six months of reforms. Just like last time a new government will come into power but they won't have any money to spend, so they'll be forced into giving in to EU demands. Mind you I do believe the austerity program is wrong and doesn't make any economic or political sense.
Piers Scholfield, BBC News Athens
Hugh Laurie, British actor
Macropolis, news service, Athens
Mehran Khalili, Athens
Alex Massavetas in Athens emails: There is just one issue and that is economics. Society is quite polarised at the moment. This will be the most difficult elections we have ever had - at least for the last decade. A huge crisis has been ongoing for years and we have been dealing with things we never had to deal with before. There is mass unemployment. I am not sure what to predict., but I am not very optimistic.
Marcus Walker, European economics editor, Wall Street Journal
Outgoing Greek Prime Minister Antonis Samaras accepting defeat earlier this evening.
Chris Morris, BBC Europe correspondent
I wonder if he yet realises what he's done? Pretty historic stuff
Chris Morris, BBC Europe correspondent
Crowd listening to Tsipras - photo by BBC's Piers Scholfield.
Tsipras: "You gave this struggle with passion, you gave hope to our people, you defeated fear and you brought a smile to every Greek man and woman. We will struggle with the same passion. Let us raise the sun over Greece. Let us raise the sun of democracy and dignity."
Tsipras: "Our victory is of all the peoples of Europe who are struggling. I would like to assure you the new Greek government will be ready to co-operate and negotiate with our friends, with a just and useful solution so that Greece will return Europe to development and social stability and values like democracy and solidarity.
"In this sincere dialogue, Greece will come with its own proposals, its own national plan of reforms and radical changes with a four-year plan, without shortages, without unrealistic proposals about our debt.
"The new Greek government will prove the Cassandras wrong. No mutual conflict but no continuation of our submission in front of us. We have a great opportunity for a new beginning a new Europe."
Tsipras speaking now - photo by BBC's Piers Scholfield.
Asteris Masouras, journalist
Tsipras: "We shall fight all together in order to rebuild our country on new foundations of justice. Because today, friends, citizens of Athens, I address every Greek man and woman. There are no victors or vanquished. Today we defeated the oligarchy. If someone won today, it is Greece, in order to create a new future with dignity."
Tsipras: "Today is a festival. Today we start with hard work... The troika [of international creditors] is over for Greece."
Eyaggelos Lazaridis in Greece emails: I live in Greece I am 41 years old, married with two children. I didn't vote Syriza. I don't believe what they say. In my opinion the next three months will be very difficult. God help us.
Tsipras: "Today the Greek people wrote history. Hope wrote history. The Greek people gave a powerful mandate. Greece is changing the page. Greece leaves behind the poverty of catastrophe, leaves behind five years of suffering."
Syriza leader Alexis Tsipras is taking the stage now in Athens, waving to the crowds under their multi-coloured banners.
The Independent Greeks, a centre-right anti-bailout party led by Panos Kammenos (pictured below, earlier this week), are projected to enter parliament with 4.7% of the vote. The party shares little ideological ground with Syriza but some analysts say its anti-austerity orientation could lead to a deal.
More than half the votes have been counted. Anti-austerity Syriza has polled 35,89%, conservative New Democracy 28.32%, far-right Golden Dawn 6.37%, centrist The River 5.85%, communist 5.42%, socialist Pasok 4.8% and centre-right Independent Greeks 4.68%.
Omaira Gill, Athens-based journalist
Macropolis analysis website