PSNI Assistant Chief Constable Will Kerr confirmed Loyalist paramilitaries have been orchestrating some of the violence seen in the past 24 hours.
We appeal to those who plan to come into the city centre to protest to stay away and let people get on with every day business such as Christmas shopping.
We are also warning anyone who does engage in criminal activity that they will face the full rigours of the law.
Violence has serious and unwanted consequences for us all and we will robustly investigate all incidents.
Today I am urging everyone to be calm, take a step back and think about how this violence is affecting not just their own communities but the whole of Northern Ireland.
More top news
ITV Border Political Editor Peter MacMahon says it's far too early to call this referendum.
A World War Two veteran has told ITV News he has fulfilled a boyhood dream by voting for an independent Scotland.
Keep on top of the referendum results as they are announced from 32 counting stations across Scotland.