Published Tuesday, 26 June 2012
The DUP has criticised the sign. (© Pacemaker)
Police said one person has been injured and taken to hospital during the spontaneous disturbances which started at around 6pm on Tuesday.
The injuries are not believed to be life threatening.
The incident comes after the words 'ériu is our queen' were laid out in large white letters on the Belfast hillside with an Irish tricolour underneath.
A PSNI statement said: "Earlier today police confirmed that they were aware of various items having been erected on Black Mountain.
"There were no offences disclosed with the erection of these items but police are continuing to monitor the situation."
Disorder at the Broadway interface has since followed.
UTV understands police land rovers and officers in riot gear are at the scene close to the Park Centre, where crowds of more than 50 youths have been involved in throwing stones.
Local DUP MP Nigel Dodds had urged police to take down the Black Mountain message, which refers to a figure in Irish mythology.
He said: "The DUP has been in contact with the police in relation to this issue and asked them to investigate whether any offence has been committed and urged its removal.
"It is very unfortunate that a small group of republicans cannot respect the views of the vast majority of people in Northern Ireland but have deliberately attempted to provoke a reaction through erecting a large sign on Black Mountain."
TUV leader Jim Allister said his office also contacted the PSNI to ask them to "immediately remove the large sign."
"This is clearly conduct liable to cause a breach of the peace. I look forward to swift action from the police," he said.
The Queen arrived in Co Fermanagh earlier to begin her two-day visit to the region, marking her Diamond Jubilee.
Other minor opposition has included graffiti reading 'Stuff your Jubilee Lizzie' and a small demonstration at City Hall over the weekend.
Mr Dodds continued: "The packed streets which greeted the Queen upon her arrival in Enniskillen are representative of the affection and respect which people have for the Queen and the Royal Family.
"I would hope that people will not be distracted from this celebration by something, which whilst offensive, is a futile gesture highlighting nothing other than their own failure."