Greek civil servants demonstrated outside government buildings on Friday to voice their angry over planned austerity measures.
Athens has agreed to make spending cuts as part of a deal with its international lenders to keep emergency loans flowing.
Public sector wages and pensions will be lowered and taxes slashed under the agreement.
Reforms include opening up a number of so-called closed shop professions to competition.
Inspectors from the EU, the European Central Bank and the International Monetary Fund are in the Greek capital to monitor the government’s progress.
Greece needs the next 8-billion-euro aid payment by October, otherwise it could run out of cash.