Greek Police arrested 14 people after the anti-austerity protests in Athens on Sunday, Kathimerini reported.
Eleven of the people were arrested in the area of Exarchia and the other three near Syntagma Square after they broke off from a peaceful protest and lobbed firebombs at police.
The detainees included three Greeks as well as three French nationals, two Swiss, four Iranians, an Austrian and a Cypriot.
The arrests came just a few hours after hooded youths lobbed firebombs at police near the National Archaeological Museum and the Culture Ministry early on Sunday.
There were no reports of injuries.