Six men have been arrested following an Easter commemoration organised by the 32 County Sovereignty Movement in Derry.
The men are currently being held in Antrim police station.
Earlier, a masked man had told several hundred people at the event in the City Cemetery that the Real IRA would continue its campaign of violence.
The man, dressed in a dark raincoat and black balaclava, appeared from the crowd towards the end of the commemoration.
“The IRA will continue to attack Crown force personnel and their installations as well as British interests and infrastructure,” he said.
The masked man added that the Real IRA would work with other dissident republican groups.
“Republican unity remains a key objective and we will work closely with other organisations.
“Continued divisions within republicanism only serve the interests of our enemies,” he said.