Petros Giannakouris, Associated Press
ATHENS, Greece — Greece's embattled Socialist government was on the point of imploding Thursday as a revolt against Prime Minister George Papandreou's planned referendum on the country's hard-won international bailout package gathered pace.
Several ministers and lawmakers called for an emergency meeting of the governing Socialists in parliament, where Papandreou has convened a cabinet session for noon.
The meltdown started after Finance Minister Evangelos Venizelos broke ranks with him on the referendum proposal, which horrified Greece's international partners and creditors, triggering turmoil in financial markets as investors fretted over the prospect of a disorderly debt default and the country's exit from the eurozone.
Alongside his referendum pledge on Monday, Papandreou said his government would face a confidence vote on Friday. With open rebellion among his ranks, it's unclear whether it can survive that long and many in Greece are calling on the establishment of a national unity government, incorporating the opposition.
Earlier Thursday, Socialist lawmaker Eva Kaili also said she would not support the government in the confidence vote. Without her support, the Socialists hold a single seat majority in the 300-member parliament.
"Right now, the country is headless," conservative opposition New Democracy party spokesman Yiannis Mihelakis said.
Finance Minister Venizelos said the country's attention should be focused on getting a crucial installment of bailout funds quickly, which has been delayed because of Papandreou's decision to back a referendum into a bailout package agreed just a week ago.
"Greece's position within the euro area is a historic conquest of the country that cannot be put in doubt," Venizelos said in a statement issued shortly after his return from Cannes in the early hours of Thursday, where he accompanied Papandreou.
Venizelos said Greece's participation in the eurozone and EU membership "cannot depend on a referendum" and that the next installment should be disbursed "without any distractions or delay."
Although he had defended Papandreou's decision to hold a referendum in a speech delivered immediately after the premier's announcement on Monday, an official close to the minister has said Venizelos had not been told in advance that Papandreou was to announce a public vote.
On Wednesday, French and German leaders told Papandreou any referendum should be on whether Greece wants to stay in the eurozone or not, adding that Athens would not get critical bailout funds until after the vote.
An initial date of Dec. 4 has been suggested for the vote. But Greece has said that without the next €8 billion installment of its existing bailout fund, the country runs out of funds in mid-November.
Greece's new debt deal would give Greece an extra €100 billion ($138 billion) in rescue loans from the rest of the eurozone and the IMF — on top of the €110 billion it was granted a year ago — and would see banks forgive Athens 50 percent of the money it still owes them.
Other ministers and governing Socialist party deputies distanced themselves from the prime minister's referendum idea.
Development Minister Michalis Chrisohoidis issued a statement calling for unity, and saying the priority was for parliament to ratify the new debt deal.
"There can be no... return to the drachma and the past," Chrisohoidis said. "We must all assume our responsibilities."
Speaking in Cannes, Papandreou said he was forced to call the referendum after it became clear there was no "broad support" from opposition parties for the bailout deal reached with the rest of the eurozone and big banks just a week ago.
Turning the referendum into a popular vote on whether Greece wants to remain in the eurozone is a risky bet that could lead to turmoil throughout the bloc.
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