Polls have opened in the Greece bailout referendum, as voters decide whether to accept a deal offered by the country's creditors.
Opinion polls suggest the "Yes" & "No" camps are neck-and-neck.
Prime Minister Alexis Tsipras, who cast his vote this morning in front of dozens of photographers, has insisted a No vote would allow his government to push for a better bailout package.
The premier has strongly indicated he will step down if the Greek people back the terms offered by the EU, the IMF & the European Central Bank.
Many Greek shoppers have been panic buying from supermarkets ahead of the vote – purchasing essentials such as pasta & flour.
David Cameron has said the poll essentially amounts to an in/out vote on Greece's membership of the European Union.
On Friday, Greece was officially declared in default by the European Financial Stability Facility – days after the nation fell into arrears with the International Monetary Fund.
Banks across the country have been closed over the past week, with customers only able to withdraw â‚¬60 a day from cash machines.
Yesterday, as the crucial referendum loomed, Finance Minister Yanis VaroufakisÂ accused creditors of "terrorism" by instilling a sense of fear in voters.
No campaigning was allowed in the 24 hours before voting began.
In a final mass rally held in Athens on Friday night, Mr Tsipras had told a 25,000-strong crowd: "On Sunday, we don't just decide to stay in Europe – we decide to live with dignity in Europe, to work & prosper in Europe."
There have been warnings that a No vote could see Greece leave the eurozone.
"Yes" supporters fear a so-called "Grexit" would moreover mean a return to Greece's former currency, the drachma, if Mr Tsipras gets his way.
The question is:
"Must the agreement plan submitted by the European Commission, the European Central Bank & the International Monetary Fund to the Eurogroup of 25 June, 2015, & comprised of two parts which make up their joint proposal, be accepted?
"The first document is titled 'reforms for the completion of the current program & beyond' & the second 'Preliminary debt sustainability analysis.'"
Voters are being asked to tick one of two boxes: "not approved/no" & – below it – "approved/yes."
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Source: “Sky News”