Athens - At least 20 people were detained by police after they took control of a studio at a radio station in Athens and went on air supporting several members of an extremist group currently under trial.
On Tuesday, the group entered the Flash news agency and voiced their support for eight members of the Revolutionary Struggle, considered in Greece to be an extremist group.
The Revolutionary Struggle members have been accused of organising several blasts in Athens as well as firing a mortar at the US embassy in the Greek capital.
The 20 people were taken to a police station, where a crowd later gathered protesting the arrests.
The accused may be charged with propagandising terrorism.