Protesters have blocked the entrances to Greece's finance and labour ministries to voice fears over their job security and pay cuts.
Demonstrators in front of the finance ministry said they do not want to be among the thousands of public sector workers to be suspended on reduced pay as part of additional spending cuts the cash-strapped Greek government is making.
Greece is depending on a 110 billion euro (£94.4 billion) bailout from other eurozone countries and the International Monetary Fund to pay its bills. It was granted a second, 109 billion euro (£93.5 billion) bailout in July, but details remain to be worked out.
Eurozone finance chiefs have indicated that Greece will get a loan instalment to avoid default even after Athens said it will not be able to meet a budget deficit target.