Yes it was Martin, and was said to be instigated by Loyalist paramiltaries.
Does anyone understanand why they did it?

Jim, the IT journalists were there and saw what they saw.
From today's IT.

"PSNI Assistant Chief Constable Alastair Finlay said most parts of Northern Ireland were peaceful over the Twelfth.

"Yet for these few streets we get headlines of violence, of people injured, of communities and relationships being broken and infrastructure and property damaged," he said.

About 200 rioters were involved in the trouble at Ardoyne. Mr Finlay described them as "mindless thugs" and said there was no evidence this disorder was orchestrated."

"While local nationalists continue to oppose the Orange Order parading past the Ardoyne shops on the Crumlin Road, the DUP MP for North Belfast Nigel Dodds said they must realise that the road was a "shared space and not just a nationalist road".

Local Sinn Féin Assembly member Gerry Kelly said the chief reason tensions were raised in the area each summer was entirely down to the continuing failure of the Orange Order to sit down and enter dialogue with its neighbours.

"There was no actual reason for the riot," local SDLP MLA Alban Maginness said, "beyond the fact that a small number of people wanted a riot, planned a riot and got a riot." "