Shares in Europe's main stock markets have plummeted after political uncertainty in Greece cast doubt over the debt-laden nation's future membership of the euro.
Stocks on Britain's FTSE 100, France's CAC and Germany's DAX all tumbled on Monday morning, while shares in Greece's banks fell by as much as 7%.
The financial markets took fright after talks to form an emergency coalition government in Athens suffered another set-back when a radical leftist leader spurned an invitation from the Greek president for more discussions.
As the political deadlock continued, investors feared the Greek crisis would spread and speculation of a Greek exit from the single European currency mounted.
Natasha Roumantzi, head of analysis at Piraeus Securities, attributed the radical drop in Greek bank shares to "the political uncertainty and the ongoing statements from Europe about the risk of Greece exiting the euro".
The market turmoil came after Britain's business secretary, Vince Cable, warned that a "massive economic impact" awaits Britain if the crisis is not contained.
In Greece, the far-left group Syriza has refused to attend today's discussions with President Karolos Papoulias, who is anxious to persuade political leaders to form a coalition government after elections a week ago failed to produce a clear winner.
Syriza leader Alexis Tsipras says his party will not support the country's bailout from the EU and International Monetary Fund ( IMF ), which has seen billions of euros in loans given in return for severe spending cuts.
But that could lead to Greece defaulting on its debt and leaving the euro altogether.
The political stalemate has raised the prospect of fresh elections in Athens next month.
There are now seven parties in parliament, none with more than 19% of the vote, but polls show increasing support for the anti-bailout, anti-austerity parties.
Shavaz Dhalla, a financial trader at Spreadex, said: "It now seems that new elections in Greece are inevitable as Syriza hopes to build on the popular distaste of austerity measures and pioneer a government which could potentially offer a referendum to the public over the supposed draconian austerity measures imposed by ECB [European Central Bank] officials...
"A potential return for the Drachma, but a catastrophe for the rest of Europe."
The issue will be high on the agenda when eurozone finance ministers meet later today in Brussels.
Ahead of the summit, the German finance ministry warned that Greece must respect the terms and timetable of its reform programme, agreed as part of the EU-IMF bailout, as the "only and right" way out of its debt crisis.
Greece is committed under the accord to finding another 11.5bn euros (£9.2bn) in savings over the next two years and needs to repay 435m euros (£349m) in maturing debt on May 15.
Worries over the instability of Greece as well as the poor health of Spain's banking sector have also impacted currency and bond markets.
Analysts fear that Spain - whose 10-year government bond yields have hovered around 6% since mid-April - and its faltering banking sector will soon require bailing out.
On Tuesday, Germany's Chancellor Angela Merkel will meet France's new socialist president Francois Hollande in Berlin for the first time, aiming to bridge differences over economic policy.
Amid growing discontent among eurozone voters with governments which stress cuts to stabilise public finances at the expense of growth, Ms Merkel and her hardline support for austerity, are under pressure after a poor regional election result at the weekend.
©Sky News
©Sky News