Angry municipal unionists and local authority health care workers took to streets to protest against the cuts to some fundamental social benefits like home care for the elderly and the disabled, which also threatened the jobs of thousands of workers.
Greece has been at the epicenter of the eurozone debt crisis and, experiencing its sixth year of recession and grappling with harsh austerity measures.
Tough austerity measures adopted by the government have led to massive protests across the country.
Jobless levels in Greece are the highest recorded in the eurozone. Last year's October rate broke every record that the state statistics agency had recorded since it began monthly reports in 2004.
On January 16, the IMF approved a $4.31-billion (3.24-billion euro) loan installment to Greece on the condition that the country imposes spending cuts and other austerity measures.