The PSNI have appealed for calm after a disturbance broke out in the loyalist Castlemara estate in Carrickfergus, Co Antrim last night.
On man in his thirties was assaulted during the incident and he was treated in hospital but has since been released.
Police arrested four men in connection with the assault.
It is believed that up to 100 people were involved in the disturbance.
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A police spokeswoman said that the trouble was reported to them shortly after 2am and calm was restored a short time later.
The PSNI have said they will maintain a "high visibility presence" in the area and they have appeal to those with influence in the community to use that influence to dissipate the tension.