More than 160 people were detained by police after violence broke out while an anti-government demonstration was dispersed in the Armenian capital, Yerevan, police said on Saturday.
Some 60 protesters sustained injuries in the fray on Friday night, according to local doctors. The Interfax news agency reported that 15 journalists were beaten or injured by flash grenades.
Rights groups criticized the crackdown, calling it illegal. The demonstrators had gathered to express their solidarity with an armed government opposition group that has occupied a police station in the capital since July 17.
The gunmen have demanded the release of Jirair Sefilian, a jailed opposition leader who has campaigned for regime change in Armenia and a tougher stance against territorial rival Azerbaijan.