Shut out of bond markets and with bailout aid locked, cash-strapped Athens has been scraping state coffers to meet debt obligations and to pay wages and pensions. With its future as a member of the 19-nation euro zone potentially at stake, a second government minister accused its international lenders of subjecting it to slow and calculated torture.

After four months of talks with its euro zone partners and the IMF, the leftist-led government is still scrambling for a deal that could release up to 7.2 billion euros ($7.9 billion) in remaining aid to avert bankruptcy.

"The four installments for the IMF in June are 1.6 billion euros. This money will not be given and is not there to be given," Interior Minister Nikos Voutsis told Greek Mega TV's weekend show.

Voutsis was asked about his concern over a 'credit event', a term covering scenarios like bankruptcy or default, if Athens misses a payment.

"We are not seeking this, we don't want it, it is not our strategy," he said.

"We are discussing, based on our contained optimism, that there will be a strong agreement (with lenders) so that the country will be able to breathe. This is the bet," Voutsis said.

Previously, the Athens government has said it is in danger of running out of money soon without a deal, but has insisted it still plans to make all upcoming payments.

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