A new U.K. -EU trade deal has imposed customs and border checks on some goods moving between Northern Ireland and the rest of the U.K. The arrangement was created to avoid checks between Northern Ireland and Ireland, an European Union member, because an open Irish border has helped underpin the peace process built on the 1998 Good Friday accord.
Seven people including three teenage boys have been charged with riot, police said.
The clashes involved children as young as 12, according to a statement from the Police Service of Northern Ireland (PSNI).
- The disturbance in the Loyalist area north of Belfast, where petrol bombs were thrown and cars were set alight, follows a night of violence in the Northern Ireland capital in which police officers were injured prompting calls for calm.
Tensions flared as some members of Northern Ireland's legislature sought to censure two dozen politicians from the Irish republican Sinn Fein party who attended the June funeral of Bobby Storey, a former head of intelligence for the Irish Republican Army. The decision is being reviewed.
In a bid to deescalate tensions, First Minister of Northern Ireland Arlene Foster said: 'I know that many of our young people are hugely frustrated by the events of this last week but causing injury to police officers will not make things better. "This orchestrated violence is senseless and reckless", he said.
Mr Beck said it was an "orchestrated attack on police".
The faction is believed to have been behind the disturbances in Newtownabbey on Saturday.
Belfast has been gripped by further unrest, as hijacked cars were set alight and PSNI officers were targeted and attacked in the north of the city on Saturday.
Rioters clash with police
I would appeal to those who are taking to the streets to stop immediately, their actions are causing nothing but harm and distress to the very communities they claim they are representing.
All the main unionist parties have demanded the resignation of Northern Ireland's police chief over the controversy, claiming he has lost the confidence of their community.
Sinn Fein MLA Gerry Kelly claimed the disturbances were "a direct effect of the actions of political unionism".
The PSNI on North Road in Carrickfergus on Sunday.
'The DUP and political unionist leaders need to show leadership and end the incendiary rhetoric'.
'By their words and actions they have sent a very unsafe message to young people in loyalist areas.
Mr Beattie added that it was "quite clear" during the violent scenes that there were adults watching from the side of the road as the teenagers participated in the disturbances. Four of them - men 18, 21, and 25 years old and a 19-year-old girl - will stand trial on charges of organising the riots.
All four are due to appear at Belfast Magistrates' Court on April 30.