Three men are expected to appear in court later charged with terrorism offences.
There was trouble between rival UDA factions
It is understood the charges relate to weekend disturbances at Carrickfergus in County Antrim.
A police officer was shot after rival loyalist gangs clashed in the town's Castlemara Estate on Saturday night.
Police said they were maintaining a high visibility presence in the area. The men, aged 34, 36 and 40, are to appear at Belfast Magistrates Court.
A total of six people have been arrested in connection with the violence to date.
A 21-year-old man arrested on suspicion of attempted murder was released without charge on Monday night.
Meanwhile, a 17-year-old man is expected to appear at Belfast Magistrates Court on 17 August charged with possession of an offensive weapon in relation to the incident.
A 36-year-old man arrested on Monday remains in custody. He is being questioned about the attempted murder of a civilian stabbed during the disturbances.