A number of petrol bombs and stones have been thrown during disorder in the Sandy Row area of Belfast.
The trouble flared in the loyalist district on Sunday evening - shortly after the release of Sinn Fein leader Gerry Adams from police custody.
Mr Adams was freed after four days of questioning over the IRA abduction and murder of Jean McConville in 1972.
The PSNI reported the area to be quiet late on Sunday night and said officers were working with community representatives to maintain calm.
There have be no reports of anyone being injured.