Greeks have voted overwhelmingly to reject the terms of an international bailout, leaving the country divided and putting it on the brink of a eurozone exit.
Thousands of people celebrated in the streets of Athens after the result showing 61.3% had voted "No" was confirmed.
Alexis Tsipras, the country's prime minister and leader of the governing Syriza party, said voters had made a "very brave choice" in a televised address.
Despite the jubilant scenes in Athens, there were also minor clashes between riot police and protesters.
Officers were seen detaining a number of young men as petrol bombs were flung towards them.
The Greek security forces have reportedly drawn up plans for possible civil unrest with banks rapidly running out of cash.
Long queues formed outside banks this morning as pensioners attempted to withdraw cash.
Scuffles broke out near a bank in Athens as people tried to enter the branch to access their pensions.