The EU has warned that eight eurozone countries, including Italy, are at risk of breaking EU rules because of excessive budget deficits.
The EU plans to create a US-style security screening system as part of efforts to fight terrorism.
European Commission chief Jean-Claude Juncker insisted that Britain would not leave the EU, as leaders prepare to discuss David Cameron's reform demands at a summit next month.
Spain backed France's decision to let EU deficit obligations slide in order to step up spending on security in the wake of the Paris terror attacks.
The prime ministers of Britain and Spain called for a "real reform of the eurozone" that makes growth and free trade a priority.
Greece leaving the eurozone would be a disaster both for the debt-laden country and the single currency, France's prime minister warned.
Time was running out to get a desperately needed debt agreement in place after 10 hours of talks in Brussels, with Greece's economy and banking system at risk of imminent collapse.
Greek Foreign Minister Nikos Kotzias ruled out his country's exit from the EU and called for calm after Greek voters rejected bailout terms of international creditors.
More than 61 percent of Greek voters rejected fresh austerity demands by the country's EU-IMF creditors in a historic referendum.
Kazakh experts have shared their opinions about the effect of the Greek debt crisis on Kazakhstan’s economy.
Greece will not exit the eurozone regardless of the outcome of the country's referendum this weekend, Italian Prime Minister Matteo Renzi said.
Eurozone finance ministers declined to extend Greece's bailout Tuesday hours before its expiry and a possible IMF default.
Eurozone finance ministers will meet again in a bid to reach a final bailout deal for Greece ahead of an EU leaders' summit the following day.
Greece does not want any more help from the IMF, minister of state Nikos Pappas said on the eve of a summit.
A Greek exit from the eurozone would be the beginning of the end of the single currency, Greek Prime Minister Alexis Tsipras was quoted.
Greek Finance Minister Yanis Varoufakis said that his country is determined to remain in the eurozone.
Greece has railed against what it sees as German dominance since the 2010 start of the eurozone financial crisis.
Eurozone ministers have handed Greece an ultimatum to request an extension to its bailout programme after crunch talks collapsed.
French Prime Minister Manuel Valls sought to reassure Chinese concerns about the eurozone, insisting that Greece will stay part of the single currency.
French President Francois Hollande urged Greece to abide by its European commitments, as the spectre of a Greek exit from the eurozone rears its head again.