The latest developments on Greece's bailout negotiations:

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12:25 p.m.

A Greek finance official says the government expects the European Central Bank to continue approving emergency liquidity assistance that Greek banks can draw even after Tuesday, when Greece's international bailout officially expires.

The ECB was expected to meet Sunday to decide what action to take about Greece. The central is bank is under pressure to end that emergency assistance.

A decision by Prime Minister Alexis Tsipras to call for a national referendum on creditor demands in exchange for bailout loans has thrown Greece's negotiations with its international lenders into turmoil. In response, other nations in the 19-nation eurozone are refusing to extend Greece's bailout program beyond its Tuesday expiration date.

Alternate Greek Finance Minister Nadia Valavani told private Mega television on Sunday "we are expecting the funding of Greek banks to continue normally via the ELA after Tuesday."

Worried Greeks have formed lines at ATM machines all weekend and some machines were running out of cash Sunday morning.

Valavani said the country's banks could see "business as usual" next week if they receive the emergency support "so long as there is calm" and Greeks don't attempt to withdraw all their savings.