A bus and a car have been burnt out during disorder in Newtownabbey.
About 100 youths gathered at the bottom of the O'Neill Road and threw stones at approaching police vehicles. The trouble broke out around 2100 BST.
BBC Radio Ulster's Will Leitch, reporting from the scene, described the situation as "tense".
It is understood there were a number of police raids in the area earlier on Monday.
Ken Wilkinson, a representative of the UVF-linked Progressive Unionist Party, said he understood the trouble was linked to three searches in the area over the past two days by officers from the Historical Enquiries Team.
He said that "the way a lot of these searches were carried out leaves a lot to be desired", adding that one of the houses raided belonged to a lady in bad health.
"I spoke to a district commander today and told him about the frustration that was on the ground.
"Obviously this has not been adhered to, and this is the result of it here tonight."
Police said they worked with community representatives to restore calm to the area by 2230 BST.