Violence broke out briefly between police and demonstrators here Thursday night, hours after Greek lawmakers approved an unpopular package of budget-cutting measures.
Thousands of demonstrators had gathered in front of Parliament to show their anger, and as dusk fell bottles were thrown at police, who responded with tear gas and pepper spray, said CNN's Diana Magnay, who was at the scene.
The government is cutting public-sector salaries, raising the retirement age and imposing new taxes in order to secure billions of euros in loans from the European Union and International Monetary Fund.
Crowds dispersed quickly, Magnay said.
Demonstrations Thursday were smaller and generally more peaceful than a day earlier, when general strikes turned violent and three people were killed when a bank was fire bombed.
Greek lawmakers voted 172 to 121 to approve the controversial package of cost-cutting measures, the prime minister's office announced.