Obama calls for urgent debt deal

US President Barack Obama has warned there is still work to be done on how the Eurozone can end a financial crisis that threatens to engulf the world.



Speaking earlier today ahead of the opening of the G20 summit in France, he said the most important topic on the agenda was Europe's problems.



Eurozone leaders wanted to present the G20 with a clear action plan, but Greece has thrown this into disarray with proposals for a referendum.



However, with political chaos in Athens the mooted bailout referendum may now be scrapped.



Meanwhile, the crisis continues to threaten Italy, whose Prime Minister, Silvio Berlusconi, has been called upon by some of his own MPs to quit.