Pro-immigrant protesters held a demonstration march in Athens on Saturday afternoon before being disturbed by members of a far-right group who clashed with police, Xinhua reported.
The protesters were marching against a fence that the Greek government plans to build on the Greek-Turkish border to stem the flow of illegal migrants to Greece.
Chanting slogans against the fence and racism, the protesters marched from the old university in the center of Athens to a district which over the past few months has become a hotspot of clashes between far-right groups and immigrants.
The march was disturbed by members of far-right group "Xrisi Aygi" (Golden Dawn), who appeared in the area and started clashing with police. The far-right activists hurled rocks against policemen before being dispersed by teargas. Local media reported that a dozen troublemakers were detained.
According to official estimates of Greek authorities, last year more than 120,000 people entered Greece and subsequently the European Union illegally. Greek experts estimate there are currently more than 500,000 illegal migrants living in Greece.