Municipal workers protest against austerity measures and the expected layoffs in the public sector
Eurozone finance ministers are set to meet in Brussels later on Monday to discuss the next instalment of bailout money for debt-laden Greece.
Greece is due about 31bn euros ($40bn; £25bn) in bailout loans.
However, eurozone members fundamentally disagree on how to deal with Greece's vast debt mountain, reports the BBC.
It will be the third such meeting in two weeks. Greece was supposed to get the money back in May, and is being keep afloat on emergency loans
The meeting is aimed at reaching agreement among the 17 eurozone members about creating a plan to return Greece to financial health.
On Sunday, French Finance Minister Pierre Moscovici said it would be "irresponsible" to fail to reach an agreement this time around "given the efforts everyone has made".
He said the eurozone was "very close to a solution."
"I don't know if there will be an agreement, I know it is possible and I want one."